Hey guys I need some help trying to decode a big block chevy. I cant get to the back numbers it was a swap into a 64 truck and it is right up against the firewall. I have the numbers off the front of the block boss in front of the head if it helps. T 121 IIV 18L131634 Any help would be greatly appreciated. Please send your replies to
socalhotrodz@aol.com Thanks so much.