My '55 1st now has a '73 Chevelle master cylinder using the Chevy Duty adapter, which looks like its the same kit as the cheaper Classic Performance Products adapter.

If you upgrade to a dual master you need to be ready to also change the brake lines to separate the front brakes from the rear.

If you look at your current master it has two lines coming off of it. One line feeds ONLY the left front. The other line feeds the right front and both rears. With a dual master that won't work.

I replumbed mine completely because at the same time I put disk brakes on the front. Bought 25 feet of line and some tools, and it took an entire day to cut, bend and run the lines.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...