bought a "350" yesterday and got home and went to check out what it exactly is. pulled the numbers off the driver side of the block and had 3970010, which looked up and can be 302, 327 or 350, i ruled out the 302 because this was in a 5 ton truck (not original motor). so my friends dad said there should be a number on the front of the passenger side head. pulled the code v1205? but i cant find anything on that. is my numbers not clean enough or pull the pan to see (dont want to would just like to drop in car since runs strong)

ps the flywheel on this thing is so big they had to put an adapter plate to the motor so the 5 ton trans (5 speed standard), which i dont need and for sale

 

Most likely a 350, but pull the pan, check the crank #.

 

checked the numbers on the front on the block passenger side, had V1205AJF i found out its a 1973 350 out of a gmc 6000 4 bolt truck, i think this will be a good starting point for my build and buddys t-56 might be comin up for sale