[steve25]

I would have to say that it depends on if the flow cooler impeller is an improvement over the stock one.

Does it look different then your stock one?

If not then I would measure your gap between the plate and impeller and adjust / tap and bend it as you would for a stock pump.

[chiphead]

Tighten up the clearance as much as possible between divider plate and impeller, without deforming anything. I tried a 8 bolt FK pump, wasn't really impressed vs a $49 iron impeller reman from NAPA. Your mileage may vary.

[Squidward]

If you will be using the 8 bolt pump, I would say just make sure your pump doesn't rub with the plate, and call it good. The FK impeller design has its own plate design to make the impeller more efficient: water goes in at the center, gets flung by the vanes to the outside where it is directed to the 2 block channels. A factory pump might need a little plate massage for efficiency, but I don't think the FK needs massaging.

[1969GTO]

Originally Posted by Squidward

If you will be using the 8 bolt pump, I would say just make sure your pump doesn't rub with the plate, and call it good. The FK impeller design has its own plate design to make the impeller more efficient: water goes in at the center, gets flung by the vanes to the outside where it is directed to the 2 block channels. A factory pump might need a little plate massage for efficiency, but I don't think the FK needs massaging.