CVF racing have pulley specs online.  The bolt pattern and pilot diameter is not limited to Ford, so you have lots of options.

http://www.cvfracing.com/

Something to keep in mind is how the pulley diameter affects the pump.  Everything else the same, smaller pulley = higher pump rpm and larger pulley = lower pump rpm.  I've only found one article about  pump rpm and it is indicated that 7000rpm is a max for racing and for the street, you want it at least turning as fast as the crank.  Source: http://stewartcomponents.com/index.php?route=information/information&information_id=8.  With that in mind, for racing the smallest water pump pulley you want with the stock damper pulley, which is about 6 5/8" is about:

5.3" for a 5500rpm shift
5.7" for 6000rpm
6.2" for 6500
Formula, (shift rpm x crank pulley  diameter) / 7000

Another thing to consider is with a smaller pulley, and therefore higher pump rpm, more power is required to turn the pump so you don't necessarily want to pick the smallest pulley.
So for street / strip, you want something no bigger than the crank pulley but no smaller than that required for your expected shift point to keep pump rpm below 7000.



Lawrenceville, GA