I recently switched out a 305 for a 350 in my firebird...for the first few months the car ran great, but then some of my ignition wiring went bad so the car sat for a couple months. I finally got that fixed and took it out on the highway, and the damn thing went into the red. I thought it might be my water pump but it is working fine, I changed the belt because it was old and I thought it might not be turning the pump well enough, and I also changed the thermostat. But after all of this it is still overheating...can anyone tell me a reason this is happening. My buddy said that it could be my cam is bad which is a stage one compucam. what do you think?