. . . and automatic GM transmissions. The original engine would've been a Pontiac 400, possibly a Stage III or even Stage IV. A 454 would be a Chevy engine, though. Art
. . . but Pontiacs were way cool back in the day, too. Same goes . . . . . . for Mercury. A '70 Cougar Eliminator would be second only to a '70 - '71 Plymouth 'Cuda in my ideal garage. ...
. . . and if the hood is original (which is likely) then it was originally either a 400 or 350 H O, judging by the hood scoops. As they say in East LA, "Mucho bitchin'!" π