I have a Case 970 from the 70s with a stuck engine. It has been sitting about 5 years. I have pulled injectors and filled cylinders with atf/acetone and also lots of pb blaster for about 3+ weeks now. I have removed the starter and pried on flywheel with a bar with no movement. I have also tried turning over with starter and a bar on the main crank at the same time. Anyone out there have experience and can lend a few tips?