There's a reason I'm asking....basically I've got a 79 beater that I haven't even driven yet...has the 1/2 tons under it. I have a trade worked out for some 3/4 ton axles, wheels and tires, but I haven't picked em up yet. Even when I do, I'm not going to be doing the swap too soon, because I'm waiting for all the other parts to do the lift, rear shackle flip and crossover. Anyway, I just got the truck running and thought I was getting close to being able to take it for a little spin, was going to bleed the brakes when I found that both rear cylinders are shot. One bleeder valve is broken off flush in the hole and the other one is stripped, will just turn and never move . Since I'm going to be swapping axles anyway, I dont want to put any more money or work into these axles, but I really dont want to have it just sitting there until I do the swap. This thing will not be on the street until after I do get the swap done, but I'd like to be able to beat around the fields aorund the house. Also, its not just the wheel cylinders that would need replacing, pretty much the entire rear lines are shot and rotten, so that would have to be replaced as well. My question is this...could I plug the proportioning valve where the rear line comes out and run it with just front brakes? I know that was alot to say jsut to ask that question, but I wanted everyone to understand the reasoning behind it, and not just say, "no way, too dangerous, you're f'n crazy," or whatever....although I may be f'n crazy, I dunno, just an idea I had. I know it wouldn't stop on a dime but its not going to be on the street...so would it work?