[Keith True]

I have a couple dozen water pumps on the shelf,and last spring I bought two new aluminum fans.We got to playing with them,and found they fit all but four of the pumps.They will fit the four with minimal grinding.I also have an NOS late 31 single thickness fan,it won't fit on three of the pumps.I always found it is the pump that is the problem,the thicker aluminum always seems to fit the bulk of them.I have some old aftermarket Toledo pumps,both A and B.The A pumps just needed a quick file,the B pumps actually needed grinding just to mount the original steel fans.