Going to put a 6.0L truck engine under my Radix 112. Previous engine was a 5.3L. I've been told that the bigger throttle body will give a significant power increase. Also been told that the 90mm tbody won't open all the way without a wiring harness adaptor. Truck has about 420 hp at the wheels and I'm hoping for close to 500 witht the motor swap. There is a guy in Canada that makes an adaptor ($200) and Summit has one for $40. Anybody used either one of these? The Summit one sounds much better....by about $140. Help appreciated.