I have a 1994 Mustang engine I am putting in a 1979 CJ5 Jeep.  I used the clutch, pressure plate, and flywheel from the Mustang.  I have a late model Ford T18, bolted to a bell housing (not sure the year on it) I got from a junk yard.  Everything is going well until I tried to get a starter that will mate to the flywheel.  The flywheel from the mustang is too small and the starter will not engage.  I was told I could purchase the clutch, pressure plate, and flywheel from a 1994 F150 (for a 5.0 of course) and it would solve my problem.  My concern in doing this is the balance of the flywheel.  I know the OD of the truck flywheel compared to the mustang flywheel is different, but what about the balance?  Will the truck flywheel work without tearing up the motor?  I would appreciate any advice you have.

Thanks