Re: ANOTHER #%*!:( BTV failure

Posted by BigKev On 2010/10/9 10:53:29

The problem with using the 51-54 Manual brake setup on a '55/56 is the TL stuff being in the way. The 51-54 the master cylinder is forward of the firewall on the frame rail near right behind the steering box. The linkage is canterleavered so the pedal arcs under the floor, and then actuates forward into the master cylinder.

55/56 manual master cylinders are mounted under the floor along the frame rail. So if you have TL, you really have to find a 55/56 manual brake setup.

I have looked and cannot find a modern master cylinder that is a direct drop in replacement for the 51-56 manual master cylinder for two reasons.

1) The fact the master cylinder mounts with bolts through the side of its case into the frame. All modern cylinders I have found mount via the back of the cylinder.

2) You can't really fab up a "L" bracket to support the modern "rear-mount" master cylinder in the stock location as the rear bolt of the stock master cylinder doubles as a pivot point for the transmission linkage. So if you put a modern master cylinder there, it would be right in the way.

I have often wonder if the one of the those after marker underfloor setups would be best that includes an arc'd pedal.