jherbert4469

Hi all. I need some advice. I have a 1969 Mustang convertible with a 302 and a T5z 5 speed Transmission. I just finished building a 347 stroker motor to replace the old 302. The engine builder told me the engine was "externally" balanced and provided me the flywheel he used to balance-test the engine. The flywheel from the original engine is designed for the T5z manual transmission (thick wide surface for the clutch) whereas the flywheel he provided me appears to be for an automatic (lighter and no surface area for the clutch).

Can I simply install the old flywheel that matches the tranny or am I forced to install the "balanced" flywheel from the engine builder, which means I can't use my tranny?

Sorry if this is an obvious issue. Forgive me as this is my first time swapping engines