Normally when I replace accessory belts on older American cars, I'll go ahead and replace the water pump at the same time, while I'm in there. Do you guys do the same thing with 328s? Also, I see that Maranello just has the parts for the pump and not the whole pump (not sure why that would be), which would be super expensive. And, I see that Superformance has a pump for £349.50, and a "Genuine Italian Manufactured Pump" for £129.95. Is there any reason I shouldn't get the cheaper one?