This message is moved from HiPo where I accidently first posted.
Thanks gents. Those sites have narrowed it down some. The Inliners casting numbers site say my # 3850817 block is a 62-78 230-250 Chevrolet. My truck is a 68 GMC, so perhaps it is the original engine. Do the 230 and 250 engines have the same block and crank, with different lenght pistons? The stamped date code is 57323/804210295. So far I haven't found any details on the stamped code. My truck should have a 250, but I'm just trying to find out what actually in it.
And thanks for the warm welcome.
