Ok so ive got a '29 A ive got an under the floor master, wilwood prop valve and 10 lbs residual valves early 39 drums up front and later bendix style in the rear and it stops good enough. After i drive a bit itll feel like im draggin a boat and the pedal will get really hard. Sometimes itll let go sometimes not and when its taken on this behavior itll leave the brake lites lit l. the brakelite switch is on the prop valve just off the master. If it sits the condition will subside. Hard to tell if its draggin all 4 when its doing it. Im so irritated when i get home i havent jacked it up and spun em. I suspect a bad rubber line swelling but everything is new.. Any suggestions before i just tear it apart. Thanks P.S. i dont have a return spring on the pedal but when it builds this pressure the pedals all the way out. It seems somethings swelling or ???