I always wanted to try milling away the entire thermostat and putting in a remote style thermostat housing. I have come to the conclusion that since it is all aluminum and there is a very large surface area to transfer heat to the air inside the plenum that removing the scalding hot water from that part of the manifold would dramatically reduce intake air temp especially for the front cylinders that always show the most evidence of detonation. Combine that with a ceramic coating on the plenum plate and I bet it would really help TQ and HP. IAT on the stock magnum is through the roof on a heat soaked engine even in very cold ambient temps, it can easily run 130 degrees on a zero degree day and 170+ on hot days.