Did you adjust the tension on the timing chain? If not it may have jumped a tooth. At any rate it sounds like the a piston has interfered with a valve.
Yes. I pulled the lugs first and it still didn't moveDoes the resistance remain with the plugs pulled?
Well I guess I'll start taking things back apart. I was so close to finally taking it for a ride.Sounds like one of the valves is bent, although it could be something else....I'm afraid the engine will have to come back out of the frame so you can find what's stopping the piston's rise.....