I'm begining to understand now! Thanks for the great info here guys! I'll start back with the engine combo for those who don't remember or didn't read the posts before. 1972 400 (.030) with SpeedPro forged flat-top pistons, block-zero decked, CAT forged H-Beam rods, factory crank and rotating assembly balanced. Heads- 1968 72cc d-ports (actual cc was 86-giving me around 9.5:1 CR), heads ported to 240cfm by Kauffman Racing, #995 valvesprings (setup at a machine shop with correct installed height), stock length valves, stock length pushrods and 1.52 Comp Magnum roller tip rockers. Have tried setting the valves at both-1/2 turn and 1/4 turn past zero lash. Using a CAT "Quiet" gear drive with single key crank gear. Holley Street Dominator intake with Holley DP carb (has a ProForm 800cfm main body kit with 78/86 jets and no choke horn). Distributer- I sent my old one to Cliff Ruggles for a check. It had issues, so I've got one of his distributers in the car right now that we know is good. Changing distributers didn't fix it. Cooling system- 4 core aluminum radiator, 5 blade Super Duty clutch fan and stock waterpump. I've flushed the engine block and radiator several times now and have disassembled the waterpump. Checked the bearings and reassembled with new gaskets-No change. I can set the timing on this engine as low as 32 degrees total and it still overheats in just a few minutes. Haven't degreed the cam or checked the cylinder pressure yet for two reasons- #1-I don't have the equipment yet. #2- When I do get these things, I'll have to learn how to use them. But that's where I'm at so far. Car is back in the garage with the timing cover off. The timing dots on the gears are still aligned perfectly, so I had that part right anyway.
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