I am kinda new to all of this too. However I went through my brakes a couple of weeks ago with the same issues. I replaced the shoes with the long ones and the s-10 cylinders. The cylinders are identical except the bores are some bigger for more power. Anyways I was talked into changing all of my old rubber lines going to the front calibers and over the rear end along with the rear cylinders. The difference was amazing! It stops on a dime! Before I was holding 5-7 psi and now 10 plus should be easy. Haven’t been back to the track yet to see what difference it will have on my 60 foot times…oh while I was under there I installed some air bags too. Give Brian a call over at GbodyParts.com and he will hook ya up