Does the truck have original equipment brakes? If so, it's best to learn to live with the high pedal. Unless you're willing to adjust the brakes about once a month, there will be times you'll be glad to have all the pedal stroke possible available to you. Even a little brake lining wear will result in the pedal going very close to the floor before there's much stopping effect.

Also, a 49 will have Huck brakes, which are a real pain in the posterior to adjust.
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!