How hard is it to put a new flywheel on an engine? I have another F250 4x4 now but I need to pull the engine and put a heavy duty flywheel on it. Problem is my mechanic became to busy to come out. Darn truck. I need this new one up and running so I can get to school. I could rent a cherry picker but I need to know if there are any problems I may run into. Thanks in advance.