They are more like 25 bux here but thats not the point. My thinking is with the 1 ton 14bFF i have now it has large wheel cylinders (1 5/16 i think). I currently have EXTREMELY poor pedal and the back brakes are locking up long before the fronts. I think this is due to the wheel cylinders requiring too much fluid with the stock halfton Master cylinder. SO my thinking was: IF the 14BSF cylinders swap with a 10bolt and 14BFF cylinders swap with a 14BSF I could potentialy put the 10bolt cylinders on the 14bFF reducing the braking force. Now don't Flame me I'm just throwing out ideas to get the brakes working better. I thought of an adjustable proportioning valve but i don't know if this will restrict the amount of fluid going to the back breaks. (i know it restricts pressure). Right now I run it with the rear line pinched off and other than only having front brakes is has MUCH better pedal and stops very well compared to having the line unpinched.