I had to put a pulley off a chevy luv on my 84 d50 today to get it running. We had to make the holes bigger(not good I know) but it had to be done. It is a bigger diameter/cirfumference(the circle is bigger so needing a bigger belt) so I am scared that it will turn my water pump too fast and over work it? Will it matter how big the pulley is?I think it's heavier too.