Quote:
Originally Posted by 1971Stepside
I'm planning to get this project going with the disc/drum set up and using the Astro proportioning valve. I haven't looked into brake lines yet, but I am getting close to that. Would love to hear what you end up going with if you don't mind.
It is so nice here today that I wanted to skip work this afternoon and push her outside for some sun, but I didn't. Here is a shot of the the stance with no bed or hood and a few other key parts  |
I actually just finished doing my research on brake setup. Here's where I'm at: Astro hydroboost (rebuild kit on order), Astro master cylinder, Astro proportioning valve, brake line kit from GMC Pauls, and Speedway Motors residual pressure valve for drums. I snuck out to the salvage yard at lunch to look at the Astro donor and confirmed that the front lines are 3/16" and the rear are 1/4" which matches the sizing of the lines in the GMC Pauls kit.
Here are the part #'s:
-GMC Pauls complete line kit (does not include tees or unions, but does include the lines out of the prop valve, front lines, front to rear line, and rear axle lines) - 1801002. These are OEM steel. We used stainless on my dad's truck but found out that it's incredibly hard to work with since it's so hard which makes any modifications difficult because it takes a special flaring tool and you have to tighten the fittings, loosen, tighten again, tighten some more, etc. to get them to seal.
-10 psi residual pressure valve - Speedway Motors - Wilwood 260-13707/Speedway 83526013707. I plan to install this somewhere in the middle of the front to rear line. Cut the line, slide the nuts over each end, flare each end, then thread into adapters that thread into the residual valve.
-Inverted flare nuts for 1/4" line - Speedway Motors - 91031819 - 1 bag. Put these on the ends of the cut in the front to rear line.
-Inverted flare to NPT adapter - Speedway Motors - 91031828 - 2 EA. These adapt the inverted flare threads on the lines to the NPT threads on the residual valve.