[JHFORD51]

I put front disc brakes and dual resivour m.c. on my 50 ford Tudor last year. I really like them. Bought them from shoebox central. Maybe they are the same thing ECI sells? Today, after about a 15 mile drive I smelled what I thought were hot brakes. Sure enough, the rear wheels and backing plates were too hot to touch.

I just had the car jacked up for other work and know with certainty that both rear drums turn freely with no drag. I am guessing that pressure must be building sequentially each time the brakes are used. Since both sides are equally hot I would lean to a bad 10# residual pressure valve or a bad m.c.

How do I diagnose without just blindly swapping parts?

Thanks