I found a few races where Don raced a Nova. There may be more.
In a 1977 IMSA race at Hallett Motor Racing Circuit Don Yenko finished 21st in car no.11 a Chevrolet Nova
In the 1977 250 mil Daytona Finale finished 64th in car no 11 Chevrolet Nova group AC DNF
In the 1977 100 mil Mid-Ohio finished 22nd in car no 11 Chevrolet Nova
Don also raced a Chevy Monza in some races in 1977
There is a guy on photopoint with some IMSA photos
http://albums.photopoint.com/j/Album...7746&a=1366255
[Edited by JoeC (04-10-2001 at 12:10 AM).]