cant smoke the skins...problem??

you might check your carb pump to see if its
adjusted properly, if everything else checks out.
you might look at your convertor they sometimes
go out of spec.
before you change camshafts, i'd try redegreeing the cam,
a stretched chain or improperly degree'd cam will cause
similar problems.
with the stall and gear you have,i'd think you could tear the
hides off on comand.
the exhaust could be better but shouldn't kill the bottom