Also, if I can ask for some additional info...........I see flywheels that are 153 tooth, some 168 tooth, some internally balanced and some externally balanced.
QUestion, is a 99 Vortec 350 internal or external balance, and what tooth flywheel is for these? The engine only had a marine flywheel on it, so I have to dig up all the stuff I need to make it automotive.

Thanks,

Don