My SB Chevy eats water pumps. I replaced my Weiand aluminum short water pump after only a few hundred miles. It squealed like a pig on startup. Ordered a Flow-Cooler cast iron water pump and it worked great . . . for a few hundred more miles. Now it's squealing on startup (goes away after a minute or so)! I use Prestone green stuff coolant, mixed with water 50/50. My fan belt is not too tight - 1/2" deflection between pulleys. I'm thinking both the pumps I've tried are "made in China" and I'm ready to bite the bullet and get an Edelbrock Made-In-The-USA unit. Pricey though. Any suggestions??? (And, NO, LincolNut . . . don't tell me to replace it with a FORD! )