It seems the more I try to dig myself out of this hole, the deeper I go. I had just gotten my block back from the machine shop on thursday where they honed the cylinders (didn't bore them out which probably led to most of my problem), polished the crank, and installed new cam bearings. Yesterday I began to put everything back together starting with the crank. I put in the new main bearings, lubricated them well with a mixture of marvel oil and 10w-30 oil, and then torqued up the crank in 3 steps to 80 ft-lb just like the manual said. Spun the crank with my hand and it spun very smoothly. Now here's where the nightmare begins, when I start to put the pistons back in starting with #1, I used one of those ARP piston ring compressors for a 4.000" bore, aligned all the ring gaps according to the manual, lubricated the cylinder wall and the piston rings with the same Marvel mixture and began to tap the piston in gently with a wooden handle. For some reason it was very hard to push in but I eventually got it in all the way to the crank. Then I tried piston #2 which was ridiculously tight but I managed to push it through til it met the crank. I figured the piston just needed to be moved up and down a little with a few turns of the crank to lubricate it better, WRONG! The crank wouldn't turn even with a flywheel turning tool. So I talked to a friend of mine who knew someone that had rebuilt several engines and asked if this was normal, and he said hell no. So then I try to take the pistons back out which is only possible by hitting the rod bolts which I did and put a few notches in the crank journals in the process. I'm going to bring the whole thing back to the machine shop tomorrow and have them put in the pistons and do whatever is necessary to have this thing running right. So basically my first engine rebuild was a complete and utter failure and the only thing I have to show from it is a drained bank account. So does anyone have a clue as to why the pistons weren't sliding well? I used speed-pro cast piston rings that are supposed to be pre-gapped, unless for some reason they weren't. Other than that I have no clue what else could be wrong. And I appologize for the length of this post.