Dual STS in the rear would be too much traction? Maybe he is looking for a little slippage to stay on top of the turbo. Ever seen any of the Super street trucks with dual BFG AT's in the rear and STS up front?
Ye thats another reason too. I will probably only have around 500-550hp with a silver 62 turbo, so I can't have so much bite that it just boggs the truck down.
