I have just purchased a new waterpump for my 86 Coupe GT from a local import parts store. It looks OK, but there is some rust on the pulley that looks suspicious. Has anyone had a bad experience with a DOLZ waterpump? I just want to make sure before I install it. I had never heard the brand name mentioned on the list (but I have heard alot about the Graf pumps). TIA, Jeff Blanchard 86CGT