What master cylinder are you guys using for manual brake setups? I have the firewall plate from dragracebrakes. I was reading that some are using a master cylinder off chryslers? I have s-10 wheel cylinders in the rear, stock up front. I have removed the stock porportioning valve, Teed the fronts together and put a residual valve inline to the rear. Mostly street car with some strip time. Any input would be great.