ProComp/Speedmaster aluminum heads

Cudafever said
no water to the heater core and no thermostat and not street driven. my electric water pump turn way slow but keep things under control at the track.........may not work on the street......
Set the water pump impeller tight to the timing cover by having a 1/4" plate of alu welded in and then machined back so the impeller just slightly scraped the timing housing with out a gasket. Threw a gasket on it and never looked back. I moves a lot of water.......but not so good if you have to run a t stat.

I was so tempted to put my electric water pump back on.. it seemed to move quite a bit of water.. but the majority of the driving it sees in the summer is on the street. I've been aiming towards being able to take it on longer trips and I just felt a mechanical pump would be more dependable in the long run... I personally run distilled water with a bottle of redline water wetter, a gutted thermostat, and no bypass... It's a remanufactured water pump, but it has a pentagon on it and has serial numbers for some fancy 340 car...
I took the heater core and heater box out years ago and never look back. I don't drive it except for on nice days...