update.... problem resolved. i went out and pulled the m/c to take in to napa to make sure i got the right one. turns out the m/c was from a 72 3/4 ton... hmmm. dont know if that had anything to do with it. well anyways, the replacement was a little pricey so i just got a m/c for a 72 1/2 ton remand for $14.00 from oreillys. made sure lines were the same and bore was too. slapped it on the booster and hooked up the prop valve then "bench" bled it on the truck by running lines back into the top of the resoirvor. about 30 pumps and all air was out. hooked up the lines and started the bleeding at the wheels. a couple of weeks ago i bought one of the pump speed bleeders and it was acting up... that frustrated me. then a bleeder valve in the rear cylinder stripped out. so off to autozone to get another cylinder. slap new cylinder on then manually bleed with some help from my gal and voila! i have brake pedal pressure! darn well better considering the only thing not new on the brake system is the prop valve and a couple peices of brake line...
anyways thanks for all the help!
