My setup is the same as 383man, no more heating issues. I had problems and learned alot from THIS THREAD .

I run a 160 thermostat, cheap black plastic flex fan(might upgrade someday), mechanical water pump, and I positioned the fan so it's part way into the shroud entrance. When I get stuck in traffic I flip on the 16" Be-Cool pusher fan, temp is always 180 or less, with a healthy 500" BB.

1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual