Hi,Piston Farmer. Was the P-30 equipped with an automatic? If so,it may have a "taller" gear than a manual. Since it is a 1-ton, it is more than likely not a 2-speed.I'm not sure about the bigger trucks,but I know that it did make a difference in the '60's-'70's 3/4-tons. I installed an "automatic" (I think 3:73)? rear-end in a '72 G.M.C.,3/4-ton pick-up,which came with a 4-speed/4:11 rear-end,(stock). On a hill,I'd have to start out in "granny",otherwise,I'd end up slipping the clutch. I've driven all kinds of trucks,including semi's for about 35 years. I KNOW how to operate a clutch.That was in a pick-up,with about a 2500 lb.load. Not sure how much weight you're planning on hauling with your 2-ton. Just something to consider. B.T.W.,once you got it up-to-speed,top -end improved considerably.From 55 m.p.h.,to about 68 m.p.h. Also like the disc-brake idea. Good-luck!
Last edited by wetwilly5757; 03/12/2013 7:20 PM.