Been chasing spongy brake pedal gremlins for over a month now. Old MC wasn't able to fully actuate the rear disk brakes, it was running out of fluid. I also snapped a brake line (few posts above).
Took off the original disk/drum proportioning valve in exchange for an adjustable one (can see it in second picture). Original was causing the rear brakes to drag.
Improvised a workbench in my gym room because I don't have a garage for this kind of stuff. Used my new workspace to make a replacement brake line, got it pretty close to the original.
New MC is from a 1980 Corvette, which has 4-wheel disk brakes. Rear reservoir is much bigger. Same bore and same size outlets makes it a straight swap for a M1009.
Waiting on one more part, a Tee splitter for the front brake line to split it direct to both front wheels.
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