I swapped over to a 1976 Corvette master cylinder back in 2002 or so. I still had DOT 3 in the system then and that master cylinder rusted away by 2004. When I replaced it, I also swapped in the Ford van wheel cylinders. Good brakes followed.
That master cylinder rusted out in 2008 or so. When I swapped in a new one, I switched over to silicone. Then my Big Block 396 died in 2012. The truck didn't move under its own power for almost a year. When the 6.2 was working, the brakes weren't. I added Hydroboost and took the entire system apart cleaning or replacing everything.
Here we are yet again 4 years down the road and only my back brakes are working. The Michelin XZL tires really howl when the rears lock up by the way. We pulled the front wheel cylinders and they were good. Fluid is coming through the lines and squirts out when bled with the pedal. All air is gone and the shoes adjusted out to almost stopping the wheels from spinning.
But, the front tires don't stop when spun and the pedal pushed. I tend to over think things sometimes and have concluded that the rears are adjusted tight enough that they engage before the fronts have moved enough to engage. Thus stopping the fluid moving to the fronts.
With the rear locker, it is a pain to adjust the rears correctly since both sides spin. Theory wise, it should only be a click or two of each rear adjuster to get them equal to the front. I wanted to throw this out to the Zone before I line my students up to spin the tires while I lay under the rear axle turning the brake spoon. What am I missing?
Thanks.