speakin of old...hehehe.. yeah i remember 427's LOL..but my rememberer cant remember a 366..?? its not i wasnt around...i cant remember..??? uhhhhhh but for chevys the casting numbers on the block behind the drivers side head on top of the block on the ledge where the bellhousing bolts up..will tell ya what block it is... go to mortec.com has most casting numbers....
