late 7o's fires bird 350 to 455 swap...

[FIREburd24]

Hey, i got a 78 fire bird erprit, and my buddy has a newer pontiac that he bought for $50 and it gots a 455 in'er. I was wondering if the 455 is a big block, and what the newest year of 455 i could put in the firebird w/out making Major changes... thanx guys Corey

[84fiero123]

drop the beast in the most you will have to do is change the computerand harness.

[76ta]

pontiac v'8s are all the same size there is no big block or small block... you will most likely need new engine mounts

[mike_24_oh]

hey they is a big block and small block i dont know what that guy was thinking a 455 is a big block its a gm motor and in 78 you shouldnt have a computer in it do you but hell you want to sell that 455 im very interested looking for one for my 67 gto ill give you a nice price for it and to tell if it a real 455 there should be a enigine code on it its like under the alternator give me them #s and ill run the thing for you ok thanks