bjuice

i know your being ask alot and all is good info write it all down on a checklist..i think you will find once you get the right radiator in your car if not already...you will have the problem of moving the water thru too slow or too fast..the cheapest thing you could do right know, is try the coolant thing then check your timing and then check to see what you have in your waterneck housing..get you a thermostate and cut the center out and place it back in place...

for the record my 511ci bbc, runs 37 degress timing, i have a custom made cross flow radiator from karrhouse. 2 one inch rows,,,i run a punched out thermostate and a csr electric waterpump and it doesn't get about 185 degree's after a full pass in 90 degree heat

Brian