I just got a replacement water pump for my 67 GTO 400. I was having an overheating problem at idle (240 deg!). It ran at about 200-210 at speed. I read all of the comments and went to Autozone and ordered a replacement pump. When I got there I as disappointed to find that the pump was a stammped steel replacement. It is made by ASC industries. My question is, my original pump wasn't bad to begin with and it was the cast impellor. My clearence between the divider plate and the pump was way to big. Should I just go with my stock and decrease the clearence? Is the replacement pump a better pump? Should I use it with the proper clearence? Who makes the best 8 bolt config water pump on the market?
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