[RN72GMC]

i converted my 72 to 1 ton running gear it all went pretty smooth i made my own brake line for the front and the E brake cables hooked up fine there's one thing i can really stress to you if you have the truck and its a true 1 ton it will have hydroboost......pull the old vacuum booster off and put the hydroboost in place of the old booster it is not a hard thing to do there's tons of thread on how to do it........the stock booster and master cylinder doesn't create enough brake assist to stop you you'll be standing on the pedal to stop i know form the hard way!! the brakes on 1 ton running gear are just far to big for the old stock booster and master cylinder plus you'll never see a vacuum brake booster on a 1 ton truck always hydroboost!!...........have fun