Hey everyone, I'm looking at buying a 327 block I found for sale. The person selling it gave me the casting number, which is 3970010. According to Mortec.com, this engine could be a 302, a 327, or a 350. At first I was assuming that the 327 and 350 would have different cylinder bores, but I looked that up on the site and they both have 4.000" cylinder bores! (I don't know how accurate this website is, either) So, how would I tell if what I am getting is a 327, or just another 350? (I don't want a 350, I know small blocks are over-done as it is, but at least a 327 is slightly less common) I appreciate any info anyone has. Thanks!