I did also drill a 1/8" hole in the t-stat for water burping...


Why only 2 core?
After doing my own research mostly online and talking to race shops on the phone, I have found that a 2 core (1" cores) CROSSFLOW aluminum radiator will cool much better than even a 4 core brass radiator, and that those 2 core aluminum ones will cool just about anything (the newest models without epoxy, furnace brazed cores). A friend of mine running an 1100hp big block uses the same size crossflow radiator and it is enough for his, so I figure good enough for mine. A different good friend has a Jeep with a big block in it, and he runs 160 all day with the same radiator I plan to buy. Good comparison there.

Thanks for the advice guys. Did the impeller disc install last night, with the radiator on the way. I am interested to see the cooling result.