hello i need a clutch.i am looking at three companies valair,southbend,phoenix. cannot decide if i should go with single or dual disc.i have 08 3500 dodge 6.7 with smarty tuner,banks intake,5" flopro turbo back exhaust. occasionally tow 7000# trailer would prefer quieter single disc but do not want to replace sooner than have to.any advice or info would be appreciated. thank you