Help selecting flywheel for 340

I have always had auto trans so im learning the manual stuff still. I see there is 130t/143t flywheel which im guessing translates into 10.5"/11" ?
My question is what dictates which size to get? The engine is a 340 6 pack that is going in my Cuda. I have an original aluminum bellhousing and a lakewood blow-proof steel bell to choose from. I would rather go with the larger clutch if there is nothing preventing it.
Author: admin