Id check pretty much what has already been said. Full throttle, the air cleaner, and the blue pump. I had to run 2 blue pumps on my ol 440/451. One wouldnt feed it. same motor I ran a tunnelram and had some little paper element air cleaners on it. Those little filters were costing me a half second in the quarter. Also where was your timing? Not sure it can get too high as long as it isnt detonating. Ive ran between 38-42 degrees in most of my big blocks N/A.
