if you are looking for a ring and pinion set check out randy's

http://www.ringpinion.com/

They should be able to get you everything you need, plus they also have calculators so you can figure out what rpm you will turn at a given speed.

1953 3600 w/ full pressure 235
"Quando Omni Flunkus Moritati"
--If all else fails, play dead.