I hate to post another thread on brakes, but after going through numerous other threads about brakes, my head is spinning... I'm trying to figure out where I went wrong with the brake system on my '33 Ford that was an old stock car.. Has '42-'48 Ford brakes all around (new wheel cylinders, shoes, drums turned, lines, and hoses). The master cylinder on the car was a single pot GM style. When I ran the part number cast on the bottom, it came up with either a single or double. I thought I'd make a smart move and go with the dual resevoir master cylinder. This MC was used on a variety of (mostly) GM vehicles and the late 60's early 70's, so I assume that it is set-up for drum/drum applications. Here is a link to it: http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=NMAM2040_0332904800 It has a 1" bore. It is mounted in the firewall and higher then the everything else. I plumbed everything with 1/4" brake line. No visible leaks. Bench bled the MC, installed it, and then vacuum bled the lines. Had problems with soft pedal, so I had someone else help me bleed the brakes today. Got a little bit of air, but even after bleeding them again I have little pedal. The brakes are all adjusted, maybe even dragging a little too much (to be sure that wasn't the problem). I've tried adjusting the pushrod quite a bit in and out, but I'm not sure how much freeplay there should be? I've heard 1/16"... Seems like everyone had their own opinions on residual valves, but seeing as how this MC was used on drum/drum cars, I assume they're built right into it? I did not plumb in any external ones residual valves. Could it be a defective MC? Appreciate any advice you guys can give... The rest of the car is pretty much done, but the brakes are haunting me!