The "dished" steering wheel was one of the first attempts at protecting drivers in case of a crash. It allowed a couple of inches of deflection of the steering wheel before a driver's chest encountered the steering shaft. If you change over to a slightly smaller diameter, flatter shaped custom wheel, you'll gain a few inches of room for "fallen chest muscles"- - - - -just remember to wear a seat belt, and/or adapt a seat belt/shoulder harness setup to the truck.
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!