Tried to install an 11inch flywheel from my 68 383HP motor onto a 70 440 motor tonight and found that the flywheel would not fit. Bolt pattern wise as it attaches to the crank the 2 motors are the same. The only thing keeping this flywheel from going on is the OD of the crank end. The 440 motor has a .025 larger od so the center hole
in the flywheel appears under size for that motor. I would think the differences in the 10.5 to 11in wheel would,be more than just that center hole ID if this 440 needs the 10.5. Can anyone shed some light on this? Thanks.