Well I just tried swapping him some .065 idle air bleeds and same thing, the hedders start to glow red right at about 2500 rpm when your holding the throttle open and steady. When I noticed them starting to glow red I gave the engine 3 or 4 shots of fuel with the accelerator pump and I noticed that made it go away. So are my main jets too lean at 64? I have some 65's I could try. This is strange to me because it runs great going down the road, no surging, no popping, no hesitations anywhere. I figured since they stopped glowing when I gave it a few shots of fuel with the accelerator pump then that means it's too lean. Correct?