Are there two different flywheels for a roller motor, one piece main seal?

 

There are 2 different flywheels for these motors. The 350 will take the 168 tooth flywheel and a 305 will take the 153 tooth flywheel the same goes for flexplates.

 

Thanks i think i read that somewhere but is there 2 for the 350 motor like a balanced and an unbalanced or something? My transmission guy told me he had a boat that had a nasty vibration in it and he had to change the flywheel to a balanced or or some bs i did not know if he knew what he was talking about so i figured i'd ask here.

Thanks

~Chris

 

There are two flywheels for a 1 piece crank that are 153 tooth, light and heavy. (both external balance)
A 168 won't fit for our cars, doesn't fit inside the bellhousing.