flywheel help

a 10.5 inch clutch takes the 130 flywheel .....the same 130 tooth flywheel can be used on a sb or BB.

some BB mainly B-bodies are 11 inch clutch which is a 143 tooth flywheel.

an 11 inch clutch needs a different bell housing which would be hard pressed to fit in an A-body.

if you have a neutral balance flywheel on your SB now it can be used as direct bolt on to any internally balanced BB

if your dealing with externally balanced engines then there will be a difference between the SB and BB in the balance ...not tooth count or diameter