Differnce of flywheel counterweight sc and n/a

[Brad Zeidler]

I'm putting a manual tranny behind my SC3800 using a flywheel from a n/a 3800 camaro. I know they use a different auto flexplate for the sc and n/a 3800's in the front drivers. Is it just the weight of the counterweight that is different between the two? and how much is each one respectively? I don't want to teardown a good running engine just to do a rebalance if I don't have to.