How do you mean? As far as I know, there were a billion corporate engines in the 78-87 GP: 231 (v6), 267, 301, 305 and maybe even 307 and 4.3(v6). I'd originally heard that the pontiac 301 was only available in '78-80, but have have others claim they were available later. I bought my '81 with the 400 installed in it. I sold that car, but bought an '86 with a 305 that I'll put the 400 I kept in it. I can look and see what it has... maybe send digital pictures if it will help.
Jimbus
Never moon a werewolf