As far as I can recall , they were orange until the A-bodies changed in 78 . Then it started being corporate blue . And now they are black .
For awhile Pontiac , Chevy's , and Olds OHV V-8's could of been found in any divisions cars . Then the Pontiac disappeared with the new 80's Camaro and Firebird getting Chevy v8's , v6's , and Pontiac 4 cyl's . The Olds disappeared when the g-body died off and the 307 went bye bye . And all that was left was the Chevy's .
OK , I didn't mention Caddy's , newer Olds , and Diesels , because I only believe in RWD muscle !!!!