1972 340 switching from auto to manual 4 speed A833. Recommendations for flywheel and bellhousing?

Hi guys so I'm rebuilding my 340 and as I do that, I'm switching my transmission from automatic to a 1971 A833 4 speed no OD. I still need to purchase a flywheel and bellhousing. I've seen that some flywheels come in different sizes even thought theyre for a small block? Can anyone help on what flywheel I need?