which brand south bend? or valair? truck will be about 315 hp with 650 ftlbs of torque. valair has a 350 hp with 800 ft lbs and then jumps to 500 hp. south bend has some 400 hp 450 and 475s. im rough with it agressive 18 year old driver so what should i get? plan on pulling at least once

 

Valair Dual Disc. I say this because you will probably do boosted launches and 3rd gear burn out and a single just won't hold.

Luke