Had a guy bring me the flathead out of his 51 F1 to fix and upgrade with some heads, intake and such. Biggest problem and his biggest concern was it's stuck, wouldn't turn. The story is he had it rebuilt locally at one of our shall I say "budget" engine shops. He said it ran good, put 800 or so miles on it then pulled it out to dress it out but that was 8 years ago and now it's stuck. I was expecting the worst, thought maybe water had got in a cylinder or 2 (possible cracked block) which I warned him could be real bad, maybe if I'm lucky a stuck valve. Pulled the intake, everything looks good and clean, bonus, has adjustable lifters. Pull the heads, hmmm....everything looks great, new .060 pistons, cylinder walls are clean, a little excess carbon on the pistons but not seeing anything to keep it from turning. I put a big bar on it and it did turn but with WAY too much effort. I'm sitting here scratching my head when my buddy watching noticed scrape marks on the flywheel. Damn, engine stand (customer brought it in on his stand) bolts are tight against the flywheel! Take the flywheel off, everything spins just fine. Waiting now for the customer to come in and get the verdict on his motor, I bet after feeling stupid he's going to be real happy! Oh, another good surprise, got a 4" stroke.