I had problems with leaks a long time ago and plugged the bypass. I run a 160 with 3 holes but I put an extender housing on top of it between it and the top radiator hose. I pipe both rear head into a y and into the extension after the thermostat. Thermostat works fine.. Block and heads cool fine. I have an old BeCool with a 3400 cfm fully shrouded electric fan. I welded an extra bung from the cool side of the radiator to a ATF heat exchanger and the coolant return goes to the small (heater) return on the water pump. I have a 67 FB conv - I only drive with the top down, and the heater is not plumbed.
It’s a 468 old EHeads that’ s a bit over 600HP and 640FtLbs. (Latest and hopefully last build). Converted from 850BG to Sniper for fuel earlier this year and just recently added the timing control. Ran fine all summer long - rarely hit 200 in the heat. Runs a bit too cool in the cold - I need to adjust the fan cut on temp., or have Snioer do it now.
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