I'd just get a Max-Torque. Make sure to buy the kind where you can install heavier springs for more stall. All I have extra is a cheap TSC type clutch.
I don't like them cause they are pulling at an idle and you can't change it. Max-Torque is hard to beat and has great customer service. If you have a problem or a clutch question Jim Donavan at Max-Torqye has the answers.