thanks guys. its gunna suck because the truck has a 3 in body lift.... any suggestions to make it go smooth? oh, its carbed. i tried to swap 2 390s in my old trucks. i tried to put an older (1969) 390 into a 1972 body with a siezed 390 but the engine mounts and tranny didnt line up. i really dont wanna go through the same ordeal again. is there any variation in the 75 and the 80 l2ob or are the exact same?