I think the best clutch setup for your car would be a clutch that is very close to the original 340 factory clutch. Which if I remember correctly was a 2300# Borg Beck pressure plate with a rag disc( what we called them back in the day) or to day, an organic disc. You could use a diaphragm pressure plate but keep the static pressure around the same 2300#. That should soften the hit some and keep the trans happy in a street car. You don't need anything in that 3000 to 3200# with an overly aggressive clutch disc, like a paddle disc or a Center Force II. there just parts breakers.