but I did not mention too that my husband measured the stroke and it was under 4 inches! (3 and 7/8) Well, we only had a cheesy tapemeasure and not a micrometer. I told the machinist that and he said that is not acceptable to verify. Since I have to put it back together obviously, and make decisions as to re-ordering parts, he wants to be sure he orders the right thing. He will only accept the crankshaft for verification. Also, the intake manifold says C6AE 9425-G. It will become obvious I know NOTHING about engines! I read the posts and can see there is alot of respectable expertise out there, but this machinist seems dead set on his idea too and I a little afraid to challenge him since I don't know anything. That bore measurement convinces my son and husband that I got taken!