motor wont turn over?

Ok with no plugs in it can't produce compression so take all the plugs out and turn the motor by hand and see if it turns over freely, then turn the motor by hand with the plugs in and see if you feel a big difference. All the while watching the exh valve and intake valve on each cylinder is opening and closing at the time that need to. I hope you get my drift.

I mean with the plugs out its like you have no heads on the motor because compression can't build and if you have a hard time turning the motor with no plugs then it would seem that it is something in the bottom end.