I am in the process of building a truck. The cab I am using is from an 86 1/2 ton 2wd pickup. It had the 4.3L in it. The brake booster is considerably smaller than the ones used on our K5's. I am using the stock 3/4 ton brakes on my axles, and you guys know there is no size or fluid capacity difference between the calipers. I am unsure on the size difference of the 14b's wheel cylinders compared to the 10b's. Should I replace the booster with a larger unit or will I be fine with the smaller one that currently resides on it?