I think the kit was installed by Hunter back in the days, as most of our 3QM30 came with a jabsco (2760-0001 or 2760-0003, the material of the impelle is the only difference, but both will do he job) raw water pump. Roughly, what you need to find is a pulley that has a basic diameter of around 4 inches (more or less, doesn't make a big difference) and make sure it has the right offset (so that it line up with the alternator pulley and crankshaft pulley). Than you'll need to orded it the pulley o that it fit's the shaft diameter of the pump (don't recall...). You'll need a sheave that can accomodate a 3L belt, but a universal sheave that can accomodate a 3L and 4L belt will do the trick. Go to your local bearing dealer with theses info and he's going to be able to find something for you. Or go online on Gates or Spaenaur website and you should be able to find something that will fit there.
