Reply to "Coolant System"

Dan, does your block use a 351C or 351W waterpump? I have a Fontana block and it uses a 351W waterpump. The best mechanical waterpump I could find was a Stewart Stage 4 but since then Meziere has come out with an excellent one that should be considered. I also use a Stewart electric booster pump close to the outlet of the radiator. Does your block have a thermostat housing? My Fontana block does not, so I use a remote  bypass thermostat, mounted up by the inlet of the radiator. The system has full flow during warmup but bypasses the radiator until the thermostat opens. Naturally, I have incorporated George’s self bleeding mods and rad fans controlled by PWM. With an 8-10 lb rad cap, even in 100° stop and go traffic, I’ve never seen a temp higher than 189°, as measured by my Holley ECU, so I know it’s accurate.