mhowsmon wrote:1) Is there any difference in size of brakes lines from front than rear for?
Usually on the fitting sizes are different. For all intents and purposes, the line sizes are the same.
mhowsmon wrote:2) MC - should front brakes hook up to front valve or rear?
At least for our Fords, the front brake lines are ALWAYS to the rear port.
As are most vehicles.
mhowsmon wrote:3) Bore size, what is the recommended size? I have heard smaller is better braking?
Almost no such thing as a consistent "is better" as it depends on the circumstances and what you're trying to achieve.
A larger bore will move more fluid, and is appropriate for power assist and larger brakes (i.e. large calipers and such) but a smaller bore will allow your foot to impart more "power" through the pedal because it has to move less fluid. But that fluid has to do some work, so there is a compromise. Too small and you don't move enough fluid. Too large and you have to push down too hard to get it to do anything.
I think all EB's were something like 7/8" maybe? Dont' trust my memory though on that. Wait for someone to confirm.
mhowsmon wrote:4) Power brakes, assume the vacuum of off of booster provides this? How far should tube from brake peddle push in the MC?
Correct as far as the engine vacuum goes. Not sure what your other question is though. What tube, and are you talking about with, or without power assist?
Assuming your '76 had the factory power brakes (most did, but manual was still available I believe) the pedal rod does not directly contact the master cylinder.
The pedal rod connects to the cantilever mechanism in the angle bracket, which pushes the booster diaphragm, which in turn pushes the booster rod into the back of the master cylinder's piston.
What are you referring to when you say "how far"?
mhowsmon wrote:My symptoms are that after bleeding brakes, I can get the drums working pretty well but I am not getting enough brake line pressure the ever engage the disc brakes (brand new calipers). I have bench bled MC, checked and re-checked for leaks. Any advice for good known setup would be greatly appreciated.
Your proportioning valve could be bad. Or a hose collapsed maybe?
Are you pulling out on the little nipple thingy (delay valve) on the prop valve when you're bleeding the front?
The prop valve is the little distribution block thingy mounted to a bracket on the frame just below the master cylinder. It's what the soft lines from the master plumb into first.
Pulling the delay valve while bleeding is not always needed, but if you're having trouble you should do it just to rule it out.
Besides, if it's sticking it could block fluid flow to the front brakes.