1970 Indianapolis 500

54th Indianapolis 500

Indianapolis Motor Speedway
Indianapolis 500
Sanctioning body	USAC
Season	1970 USAC Trail
Date	May 30, 1970
Winner	Al Unser, Sr.
Winning team	Vel's Parnelli Jones Racing
Average speed	155.749 mph (250.654 km/h)
Pole position	Al Unser, Sr.
Pole speed	170.221 mph (273.944 km/h)
Fastest qualifier	Al Unser, Sr.
Rookie of the Year	Donnie Allison
Most laps led	Al Unser, Sr. (190)
Pre-race ceremonies
National anthem	Al Hirt
"Back Home Again in Indiana"	Saverio Saridis
Starting command	Tony Hulman
Pace car	Oldsmobile 442
Pace car driver	Rodger Ward
Starter	Pat Vidan [1]
Estimated attendance	250,000 [2]
TV in the United States
Network	ABC's Wide World of Sports
Announcers	Jim McKay, Rodger Ward
Chronology
Previous Next 1969 1971

The 54th 500 Mile International Sweepstakes was held at the Indianapolis Motor Speedway in Speedway, Indiana on Saturday, May 30, 1970. ^{[3] [4] [5]} Al Unser, Sr. dominated the race, winning the pole position and leading 190 laps (of 200) en route to victory. He joined his brother Bobby as the first duo of brothers to win the Indianapolis 500; ^[4] it was the first of his four victories at Indianapolis. Car owner Parnelli Jones, who won the race as a driver in 1963, became the second individual (after Pete DePaolo) to win separately as both a driver and as an owner.

Unser turned 31 a day earlier and took home $271,697 out of a record $1,000,002 purse. For the first time in Indy history, the total prize fund topped a million dollars.

Rain on race morning delayed the start by about thirty minutes. On the pace lap, Jim Malloy smacked the outside wall in turn four, which delayed the start further. ^[6]

All 33 cars in the field were turbocharged for the first time. This was the final 500 in which the winner celebrated in the old Victory Lane at the south end of the pits; it was relocated nearer the finish line for 1971.

Race schedule

The race start time was scheduled for 12:00 noon local time, a slight departure from the traditional 11:00 am start time that was used during most of the 1960s. With the race scheduled for Saturday May 30, Speedway management announced that Sunday May 31 would be the designated rain date, the first time the race would be permitted to run on a Sunday. However, despite a brief rain delay on race morning, the full 500 miles was completed Saturday, and Sunday was not needed.

This would be the last Indy 500 that was scheduled for the traditional fixed date of May 30. Through 1970, Memorial Day was a fixed date holiday observed on May 30 regardless of the day of the week. For 1970, the date of May 30 fell on a Saturday. From 1911 to 1970, the race was scheduled for May 30, regardless of the day of the week, unless May 30 fell on a Sunday. In those cases, the race would be scheduled for Monday May 31. The Uniform Monday Holiday Act would take effect in 1971, and for 1971 and 1972, the race would be scheduled for the Saturday of Memorial Day weekend. In 1973, it was scheduled for Monday (but rain delayed it until Wednesday). From 1974 onward, it was scheduled for the Sunday of Memorial Day weekend. From 1974 onward, the race would only be held on May 30 if that date fell on a Sunday.

The annual Carburetion Days practice session, along with pit stop practice, on Wednesday May 27 was closed to the public. ^[7]

Race schedule — May, 1970 Sun Mon Tue Wed Thu Fri Sat           1 Practice 2 Practice 3 Practice 4 Practice 5 Practice 6 Practice 7 Practice 8 Practice 9 Practice 10 Practice 11 Practice 12 Practice 13 Practice 14 Practice 15 Practice 16 Pole Day 17 Time Trials 18 Practice 19 Practice 20 Practice 21 Practice 22 Practice 23 Time Trials 24 Bump Day 25   26   27 Carb Day 28 Parade 29 Meeting 30 Indy 500 31 Rain date

Color Notes Green Practice Dark Blue Time trials Silver Race day Red Rained out* Blank No track activity *Includes days where track activity was significantly limited due to rain

Practice and time trials

Al Unser, Sr. set the fastest speed during practice, with a lap of 171.233 mph. Unser led the speed chart on five of the practice days, and was the only driver to crack the 170 mph barrier during the first two weeks. A. J. Foyt (169.173 mph) and Art Pollard (169.1 mph) were close behind.

John Cannon wrecked on Sunday May 10, and was unable to qualify. On Monday May 11, defending race winner Mario Andretti spun and wrecked in turn four. His car hit the inside wall twice, and the car was heavily damaged. Andretti was not injured.

On Tuesday May 12, Dennis Hulme's car caught fire in turn three. He bailed from the moving machine, suffering burns to his hands and feet. He withdrew due to the injuries.

Pole Day – Saturday May 16

Al Unser, Sr. won the pole position over Johnny Rutherford by 0.01 seconds, a record closest margin for the pole position at the time. A. J. Foyt rounded out the "all over 170 mph" front row. Unser's pole speed of 170.221 mph (his fastest single lap was 170.358 mph) was not a record – which marked the first time since the 1940s that two consecutive years went by without track records set during time trials at Indy.

Rain halted pole day qualifying at 3:42 p.m. with 17 cars in the field . A few cars (namely Lloyd Ruby, Gary Bettenhausen, and Peter Revson) were still waiting in line when the rains came. USAC officials closed the track for the day, and those cars were deemed ineligible for the pole round. In subsequent years, the rules would be changed to allow all cars in the original qualifying draw order at least one chance to make an attempt during the pole round, regardless if it extended into an additional calendar day due to rain.

Rookie Tony Adamowicz suffered bad luck during his attempt. On his first qualifying lap, the yellow light was turned on by error. He slowed down, and his first lap was turned in at 160.829 mph. The green light came back on moments later, and he completed the run. Although he had two laps over 166 mph, his first lap pulled his average down to 164.820 mph, and made him the second-slowest car in the field for the day.

Pos	No.	Name	Speed (mph)	Notes
1	2	Al Unser	170.221
2	18	Johnny Rutherford	170.213
3	7	A. J. Foyt	170.004
4	11	Roger McCluskey	169.213
5	66	Mark Donohue	168.911
6	10	Art Pollard	168.595
7	3	Bobby Unser	168.508
8	1	Mario Andretti	168.209
9	31	Jim Malloy	167.973
10	84	George Snider	167.660
11	48	Dan Gurney	166.860
12	9	Mike Mosley	166.651
13	27	LeeRoy Yarbrough	166.613
14	97	Bruce Walkup	166.459
15	38	Rick Muther  R	165.654
—	36	Tony Adamowicz  R	164.820	Bumped by #58
—	92	Steve Krisiloff  R	162.448	Bumped by #89
—	5	Gordon Johncock	—	Flagged off
—	5	Gordon Johncock	—	Waved off
—	95	Sam Posey  R	—	Blown engine
—	23	Mel Kenyon	—	Pulled off
—	76	Kevin Bartlett  R	—	Waved off
—	94	Bentley Warren  R	—	Pulled off
—	93	Greg Weld  R	—	Crash
—	74	Jim McElreath	—	Pulled off

Second Day – Sunday May 17

Three drivers shut out from the pole round came back to qualify on the second day. Peter Revson (167.942 mph) was the 9th-fastest car in the field, but lined up 18th due to being a second day qualifier. Lloyd Ruby went out for his first attempt, but when he raised his hand to signify the intent to start his attempt, the officials did not see it, and inadvertently waved him off. After he persuaded the officials for a do-over, he had a lap of 169.428 mph, but burned a piston on the fourth and final lap. ^[8] The incident drew the ire of the team, as they felt the officials cost them a chance to be the day's fastest qualifier (for having run the extra laps). Ruby went out again later in the day with a new engine, but waved off after one slow lap.

Pos	No.	Name	Speed (mph)	Notes
16	73	Peter Revson	167.942
17	5	Gordon Johncock	167.015
18	15	Joe Leonard	166.898
19	75	Carl Williams	166.590
20	16	Gary Bettenhausen	166.451
21	20	George Follmer	166.052
22	23	Mel Kenyon	165.906
23	83	Donnie Allison  R	165.662
24	22	Wally Dallenbach Sr.	165.601
—	74	Jim McElreath	163.592	Bumped by #32
—	19	Ronnie Bucknum	—	Waved off
—	12	Lloyd Ruby	—	Blown engine
—	76	Kevin Bartlett  R	—	Waved off
—	12	Lloyd Ruby	—	Pulled off
—	56	Jim Hurtubise	—

Third Day – Saturday May 23

After a disappointing first weekend, Lloyd Ruby rebounded to complete his qualifying attempt at 168.895 mph. A busy day saw 14 attempts, and the field was filled to 33 cars. Two drivers (Bentley Warren and Tony Adamowicz) were bumped.

Pos	No.	Name	Speed (mph)	Notes
25	25	Lloyd Ruby	168.895
26	32	Jack Brabham	166.397	Bumped #74
27	19	Ronnie Bucknum	166.136
28	93	Greg Weld  R	166.121
29	89	Jerry Grant	165.983	Bumped #92
30	58	Bill Vukovich II	165.753	Bumped #36
31	44	Dick Simon  R	165.548	Bumped #94
32	67	Sammy Sessions	165.373
—	77	Kevin Bartlett  R	165.259	Bumped by #14
—	94	Bentley Warren  R	164.805	Bumped by #44
—	56	Jim Hurtubise	—	Incomplete
—	78	Larry Dickson	—	Pulled off
—	50	Arnie Knepper	—	Waved off
—	17	John Cannon  R	—	Waved off

Bump Day – Sunday May 24

Jim McElreath put the fourth Foyt entry in the field, bumping Bartlett. No other cars, however, were able to show enough speed to make the field. Jigger Sirois, infamous for missing the 1969 race, fell far short in Jack Adam's Turbine car.

Pos	No.	Name	Speed (mph)	Notes
33	14	Jim McElreath	166.821	Bumped #77
—	53	Arnie Knepper	165.320	Too slow
—	54	Jigger Sirois	164.692	Too slow
—	99	Denny Zimmerman	158.912	Too slow
—	8	Larry Dickson	158.479	Too slow
—	21	John Cannon	—	Waved off
—	95	Sam Posey	—	Crash

Alternates

• First alternate: Arnie Knepper (#50, #53, #96) ^[9]

Failed to qualify

• Tony Adamowicz  R  (#36, #78)
• Chris Amon  R  (#21, #73, #75)
• Sonny Ates (#58, #59)
• Kevin Bartlett  R  (#76, #77)
• Tom Bigelow  R  (#34)
• John Cannon  R  (#17, #21)
• Larry Cannon  R  (#47)
• Larry Dickson (#8, #78)
• Darrell Dockery  R  (#62)
• Charlie Glotzbach (#45)
• Denny Hulme (#75)
• Jim Hurtubise (#56)
• Bruce Jacobi  R  (#71)
• Jerry Karl  R  (#52)
• Steve Krisiloff  R  (#92, #99)
• Lee Kunzman  R  (#77, #99)
• Al Loquasto  R  (#26, #35, #99)
• Bruce McLaren  R  (#5, #79)
• Butch Morley  R  (#63)
• Carlos Pairetti  R  (#8)
• Sam Posey  R  (#95)
• Bill Puterbaugh  R  (#90)
• Bill Simpson  R  (#28)
• Jigger Sirois  R  (#54, #72)
• Bud Tingelstad (#35)
• Bob Veith (#90)
• Bentley Warren  R  (#94)
• Denny Zimmerman  R  (#50, #98, #99) ^[10]

Starting grid

Row	Inside		Middle		Outside
1	2	Al Unser	18	Johnny Rutherford	7	A. J. Foyt  W
2	11	Roger McCluskey	66	Mark Donohue	10	Art Pollard
3	3	Bobby Unser  W	1	Mario Andretti  W	31	Jim Malloy
4	84	George Snider	48	Dan Gurney	9	Mike Mosley
5	27	LeeRoy Yarbrough	97	Bruce Walkup	38	Rick Muther  R
6	73	Peter Revson	5	Gordon Johncock	15	Joe Leonard
7	75	Carl Williams	16	Gary Bettenhausen	20	George Follmer
8	23	Mel Kenyon	83	Donnie Allison  R	22	Wally Dallenbach Sr.
9	25	Lloyd Ruby	32	Jack Brabham	19	Ronnie Bucknum
10	93	Greg Weld  R	89	Jerry Grant	58	Bill Vukovich II
11	44	Dick Simon  R	67	Sammy Sessions	14	Jim McElreath

R Indianapolis 500 rookie

W Indianapolis 500 winner

Race recap

Start

Rain delayed the start of the race by about 25 minutes. On the final pace lap, the field was coming through turn four to take the green flag. Suddenly, Jim Malloy on the outside of the third row, suffered a rear suspension failure, and smacked the outside wall. His car veered across the track to the inside, but narrowly avoided contact with any other car. The field was halted on the mainstretch under the red flag to clean up the accident. During the delay, teams were permitted to top off their fuel tanks, after burning three laps of methanol.

The field was restarted after the red flag, and 32 cars took the green flag. Johnny Rutherford swept across to take the lead into turn one. Down the backstretch, Al Unser, Sr. tucked in behind, and took the lead going into turn three. Unser led the first lap.

Lloyd Ruby, who started 25th, notably passed ten cars on the first lap. By the third lap, Ruby was in the top ten.

First half

The early laps focused on the mad charge of Lloyd Ruby, who was up to 5th place by about lap 28. The yellow flag came out when Art Pollard blew an engine. Under the caution, Mario Andretti was forced to make an unscheduled pit stop to repair loose bodywork. He rejoined the race, but lost many positions.

As the race passed the 100-mile mark, Al Unser, Sr. led, with Johnny Rutherford running second, and A. J. Foyt and Lloyd Ruby battling for third.

Al Unser, Sr. led the first 48 laps. He gave up the lead to A. J. Foyt during a pit stop on lap 49. One lap later, Foyt entered the pits, giving the lead to Lloyd Ruby. Suddenly Ruby was given the black flag for smoke due to broken drive gears. Ruby's dramatic race was over after completing only 54 laps. Meanwhile, Johnny Rutherford stalled exiting the pits, losing considerable track position.

Unser re-took the lead on lap 54, and led until the halfway point. Mario Andretti once again had to make an unscheduled pit stop, this time to change the right rear tire. Through most of the race, he was experiencing handling issues with the right rear suspension.

Second half

Al Unser moved back to the front on lap 106, and he would not relinquish the lead. Johnny Rutherford, who was a factor in the first half, dropped out after 135 laps due to a broken header.

Roger McCluskey, who had dropped out on lap 62 with suspension damage, relieved Mel Kenyon on lap 112.

On lap 172, Roger McCluskey (driving for Kenyon), spun going into turn three, and crashed hard into the outside wall. Ronnie Bucknum was collected in the crash. Sammy Sessions locked up the brakes and nearly slid into the crashed cars. Sessions gained control, weaved his way through, and continued in the race. Spilled fuel started pouring from one of the crashed cars, and a small fire broke out. As the field approached the scene, several cars got into the fluid and spun. Wally Dallenbach and Jack Brabham spun but continued. Mario Andretti nearly spun out, but he made it through the scene unscathed. The fire was quickly extinguished, but what turned out to be the final yellow light of the race was on for over 14 minutes (lap 172 through lap 181) to clear the track.

Finish

With about 25 laps to go, Al Unser, Sr. had lapped the entire field. Unser's crew gave him the "E-Z" sign on his chalkboard, and both Mark Donohue and A. J. Foyt got their lap back.

With Unser leading comfortably, the focus became the battle for second between Mark Donohue and A. J. Foyt. With only a handful of laps left, Foyt suddenly slowed in turn one. He pulled to the apron, but stayed out on the track attempting to nurse the car to the finish line.

Al Unser, Sr. led a total of 190 laps en route to his first Indy victory. Unser won by 32.19 seconds over second place Mark Donohue, over three minutes over third place Dan Gurney in his final 500 as a driver. A very slow A. J. Foyt fell to 10th in the final standings.

Box score

Finish	Start	No	Name	Chassis	Engine	Tire	Qual	Laps	Status
1	1	2	Al Unser	Colt	Ford V-8	F	170.221	200	Running
2	5	66	Mark Donohue	Lola	Ford V-8	G	168.911	200	+32.19
3	11	48	Dan Gurney	Eagle	Offenhauser	G	166.860	200	+3:12.21
4	23	83	Donnie Allison  R	Eagle	Ford V-8	G	165.662	200	+3:44.82
5	33	14	Jim McElreath	Coyote	Ford V-8	G	166.821	200	+4:30.89
6	8	1	Mario Andretti  W	McNamara	Ford V-8	F	168.209	199	Flagged
7	29	89	Jerry Grant	Eagle	Offenhauser	G	165.983	198	Flagged
8	15	38	Rick Muther  R	Brawner	Offenhauser	G	165.654	197	Flagged
9	19	75	Carl Williams	McLaren	Offenhauser	G	166.590	197	Flagged
10	3	7	A. J. Foyt  W	Coyote	Ford V-8	G	170.004	195	Flagged
11	7	3	Bobby Unser  W	Eagle	Ford V-8	G	168.508	192	Flagged
12	32	67	Sammy Sessions	Vollstedt	Ford V-8	G	165.373	190	Flagged
13	26	32	Jack Brabham	Brabham	Offenhauser	G	166.397	175	Piston
14	31	44	Dick Simon  R	Vollstedt	Ford V-8	G	165.548	168	Flagged
15	27	19	Ronnie Bucknum	Morris	Ford V-8	G	166.136	162	Crash T3
16	22	23	Mel Kenyon (Roger McCluskey Laps 112-160)	Coyote	Offenhauser	G	165.906	160	Crash T3
17	24	22	Wally Dallenbach Sr.	Eagle	Ford V-8	G	165.601	143	Coil
18	2	18	Johnny Rutherford	Eagle	Offenhauser	G	170.213	135	Header
19	13	27	LeeRoy Yarbrough	Vollstedt	Ford V-8	G	166.559	107	Turbo Gear
20	10	84	George Snider	Coyote	Ford V-8	G	167.660	105	Suspension
21	12	9	Mike Mosley	Eagle	Offenhauser	G	166.651	96	Radiator
22	16	73	Peter Revson	McLaren	Offenhauser	G	167.942	87	Magneto
23	30	58	Bill Vukovich II	Brabham	Offenhauser	F	165.753	78	Clutch
24	18	15	Joe Leonard	Colt	Ford V-8	F	166.898	73	Switch
25	4	11	Roger McCluskey	Scorpion	Ford V-8	G	169.213	62	Suspension
26	20	16	Gary Bettenhausen	Gerhardt	Offenhauser	G	166.451	55	Valve
27	25	25	Lloyd Ruby	Mongoose	Offenhauser	F	168.895	54	Drive Gear
28	17	5	Gordon Johncock	Gerhardt	Offenhauser	G	167.015	45	Piston
29	14	97	Bruce Walkup	Mongoose	Offenhauser	F	166.459	44	Timing Gear
30	6	10	Art Pollard	Kingfish	Offenhauser	F	168.595	28	Piston
31	21	20	George Follmer	Brawner	Ford V-8	F	166.052	18	Oil Gasket
32	28	93	Greg Weld  R	Gerhardt	Offenhauser	F	166.121	12	Piston
33	9	31	Jim Malloy	Gerhardt	Offenhauser	F	167.895	0	Crash T4

Note: Relief drivers in parentheses ^[11]

 W  Former Indianapolis 500 winner

 R  Indianapolis 500 Rookie

Race statistics

Lap Leaders Laps Leader 1–48 Al Unser, Sr. 49 A. J. Foyt 50–51 Lloyd Ruby 52 Mark Donohue 53 Jack Brabham 54–100 Al Unser, Sr. 101 A. J. Foyt 102–105 Mark Donohue 106–200 Al Unser, Sr.

Total laps led Driver Laps Al Unser, Sr. 190 Mark Donohue 5 A. J. Foyt 2 Lloyd Ruby 2 Jack Brabham 1

Yellow Lights: 3 for 24 minutes, 45 seconds [12] Laps* Reason Pace lap Jim Malloy crash in turn 4 (3:15; red flag) 28–30 Art Pollard blown engine (4:00) 54–56 Lloyd Ruby engine fire (3:40) 172–181 McCluskey, Bucknum crash in turn 3 (17:45) * – Approximate lap counts

Tire participation chart [13] [14]
Supplier	No. of starters
Goodyear	23
Firestone	10*
* – Denotes race winner

Broadcasting

Radio

The race was carried live on the IMS Radio Network. Sid Collins served as chief announcer for the 23rd consecutive year. Len Sutton served as "driver expert" for the fifth year. At the conclusion of the race, Lou Palmer reported from victory lane. The entire on-air crew remained mostly consistent from 1966 to 1969. The broadcast came on-air at 11:30 am local time, with a thirty-minute pre-race show scheduled. However, the rain delay increased the pre-race coverage to almost an hour. After the death of Bill Dean, Jack Morrow assumed the role of producer.

The broadcast was carried by over 1,000 affiliates in all fifty states, AFN, the CBC, and reached locations such as Vietnam and had four foreign language translations. The broadcast had an estimated 120 million listeners worldwide.

Among the celebrity interviews Sid Collins conducted in the booth were Edie Adams, Dennis Hulme, Billy Shaw, Chris Economaki (ABC Sports), Larry Bisceglia, Sam Hanks, Pete DePaolo, Bill Holland, Senator Vance Hartke, Tony Hulman, Duke Nalon, Johnnie Parsons, and J. C. Agajanian. Astronaut Pete Conrad, who was a fellow passenger with Tony Hulman in the pace car for the second year in a row, was also interviewed during the pre-race coverage.

Indianapolis Motor Speedway Radio Network
Booth Announcers	Turn Reporters	Pit/garage reporters
Chief Announcer: Sid Collins Driver expert: Len Sutton Statistician: John DeCamp Historian: Donald Davidson	Turn 1: Mike Ahern Turn 2: Howdy Bell Backstretch: Doug Zink Turn 3: Ron Carrell Turn 4: Jim Shelton	Chuck Marlowe (north) Luke Walton (center) Lou Palmer (south)

Television

The race was carried in the United States on ABC's Wide World of Sports . The broadcast aired on Saturday June 6. Jim McKay anchored the broadcast with Rodger Ward and Chris Economaki as analysts. Ward drove the pace car at the start of the race. It was the last time the "500" was not seen on over-the-air television the day of the race.

For the final time, the race was shown live on MCA closed-circuit television in numerous theaters across the United States. Charlie Brockman served as anchor.

The "Wide World Of Sports" broadcast has re-aired on ESPN Classic starting in May 2011.

ABC Television
Booth Announcers	Pit/garage reporters
Announcer: Jim McKay Color: Rodger Ward	Chris Economaki

Notes

See also

• 1970 USAC Championship Car season

References

1. Fox, Jack C. (1994). The Illustrated History of the Indianapolis 500 1911-1994 (4th ed.). Carl Hungness Publishing. p. 22. ISBN   0-915088-05-3.
2. Keating, Thomas R. (May 31, 1970). "Tony's Luck Held Again, But Few Doubted It Would". The Indianapolis Star. p. 1. Retrieved June 2, 2017– via Newspapers.com.
3. "Al Unser joins brother Bobby on list of Indy 500 winners". Eugene Register-Guard. (Oregon). Associated Press. May 31, 1970. p. 1B.
4. Taylor, Jim (May 31, 1970). "Pole-sitter Unser easy Indy winner". Toledo Blade. p. D1.
5. Jones, Robert F. (June 8, 1970). "Brother Al's turn in the 500". Sports Illustrated. p. 30.
6. "Rain delays 500; Malloy snaps bar". The Bulletin. (Bend, Oregon). UPI. May 30, 1970. p. 8.
7. "Pit Pass". The Indianapolis Star. May 27, 1970. p. 31. Retrieved March 7, 2022– via Newspapers.com.
8. Marquette, Ray (May 18, 1970). "Revson Leads Pack; Ruby Engines 'Blow'". The Indianapolis Star. p. 1. Retrieved May 31, 2018– via Newspapers.com.
9. The Talk of Gasoline Alley - 1070-AM WIBC, May 14, 2004
10. "1970 International 500 Mile Sweepstakes". ChampCarStats.com. Retrieved 27 June 2015.
11. "International 500 Mile Sweepstakes – May 30, 1970". ChampCarStats.com.
12. "23+ Minutes Of Yellow Light Time". Indianapolis News . June 1, 1970. p. 26. Retrieved August 20, 2024– via Newspapers.com.
13. "500-Mile Race Scorecard". Indianapolis News . May 29, 1970. p. 19. Retrieved August 10, 2024– via Newspapers.com.
14. "Race scorecard". The Indianapolis Star . May 30, 1970. p. 1. Retrieved August 10, 2024– via Newspapers.com.

Works cited

• 1970 Indianapolis 500 Press Information – Daily Trackside Summary
• Indianapolis 500 History: Race & All-Time Stats – Official Site
• 1970 Indianapolis 500 at RacingReference.info
• 1970 Indianapolis 500 Radio Broadcast, Indianapolis Motor Speedway Radio Network

1969 Indianapolis 500 Mario Andretti

1970 Indianapolis 500 Al Unser

1971 Indianapolis 500 Al Unser