DETROIT. — Two NASCAR newcomers grabbed honors at the 250-mile Detroit anniversary race here recently when Tommy Thompson, slightly built sales en gineer from Louisville, won his first major victory in the stock car association circuit. The second newcomer was Thompson's 1951 Chrysler V-8 which also won its first major NASCAR event. Thompson, who won the $5,000 first prize and a 1951 Packard convertime roared his Chrysler through a field of 59 starters dur ing the afternoon to cross the finish line about a half-lap ahead of Joe Eubanks, Spartanburg, S. C., Oldsmobile 88 driver. Following the race, Thompson said his car was equipped with fluid-drive but that he had chosen Standard steering rather than the power steering device offered as optional equipment on the New Yorker models. “However,” he said, “my next car will have power-steering. While I don't think I had the astest car on the track, I'm cer in I had the safest one.” Third place was taken by John ny Mantz, Long Beach, Calif., driving his own Nash Ambassa dor. Among the first 12 cars to finish were three Oldsmobile 88s, two Nashs, two Fords, one Chrys ler, one Plymouth, one Pontiac one Chevrolet and a Mercury. The race was the chief sports event of Detroit's 250th birthday celebration. Sixteen companies exhibited the oldest and the new est models they have produced.