[3] He had an opportunity to race in the 1970 Indianapolis 500, but during the first lap of his qualifying attempt in his Eagle-Offy the yellow light was shown and Adamowicz slowed.

[citation needed] Adamowicz returned to sports cars, racing TransAm in an Autodynamics Dodge Challenger as teammate to Sam Posey, achieving second place in the 1971 24 Hours of Daytona in a Ferrari 512S, shared with Ronnie Bucknum, and third place in the 1971 24 Hours of Le Mans with Sam Posey in a 512M [3] Also in September 1971 Adamowicz won 12 Horas Marlboro in Yahuarcocha Ecuador in a Ferrari 512S.

After the decline of the Can Am and F5000 formulas, he moved to IMSA series and won the 1979 GTU championship in an Electramotive Nissan 280ZX and 1982 GTO championship in an Electramotive 280ZX-T.[citation needed] He returned to prototypes in 1984 but had little success at that level and retired after the 1989 24 Hours of Daytona.

The car is now owned by Doug Magnon, the founder of the Riverside International Automotive Museum, and prepared by mechanic Bill Losee.

As the Eagle had been parked immediately after the 1969 season, and was not run again until following its restoration in 2008, Adamowicz remained the only driver to actually have driven this car.