Where is the rack & pinion going to be mounted? It sounds like you might be thinking about using one on a straight-axle setup, and there can be some serious safety concerns with that type of system. PM me if you like- - - -not wanting to get into a public whizzing contest, just concerned!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!