mikey

well today i finally got around to putting a new dual brake master cylinder into my restomod.. for those who haven't been able to keep up with my sporadic posting about this project, i engineered my own caliper brackets to fit early C4 disc brakes on all 4 corners of my '64. The 1985-87 brakes fit inside 15" wheels, which was key to my project, along with the fact that I can get parts at autozone.
i did not install power brakes which lead to the too-stiff pedal with the C5 master that was donated for the project..
so i found a 7/8" bore dual master cylinder, plumbed new line, bled the whole system thoroughly, adjusted the brake pedal rod and now the manual disc brake setup feels 100% better.
adjusting the brake pedal rod was a critical step, as it had been threaded in (shorter) with the C5 master and with the new master, the pedal was too soft until we lengthened the rod distance again.
just thought i'd post that last bit for anyone who might be "engineering" their own brake system.

now i'm off to search the forum for how to adjust brake pedal height.

cheers

Beach Dude

Which master cylinder did you finally end up using?

Avispa

The brake pedal height can be adjusted by cutting the rubber stop bumper mounted in the pedal bracket. Cutting the bumper will raise the pedal. Once you get the height you want, you can change the pushrod length for correct engagement with the master cylinder.

mikey

RJ, et. all,
I lied, it was a 15/16" bore.. I forgot, the 7/8" was more of a F*rd style and I wanted the chevy look..

hotrodsusa.com p/n B3M 2410090 is what I bought.

off to the garage to have a look at that pedal height.. thanks!