[Stout72]

Ok, now it makes sense. I was fooling with this solo, and since my only other Chevy was a '65 El Camino, I'd never taken notice of a combo valve before... so I didn't know what to look for. Thanks Alex.

Fast68Chevy, I'm sure it's the rear wheel cylinders. While I was fooling with it yesterday, I pumped the brakes a bunch and was rewarded with 2 puddles of brake fluid on the street. That, in addition to the problem with the calipers up front and system contamination, the Beast is on the bench until I can rip into it.

boilrman, I'll look for that other post.

Thanks to you all for your advise. Glad I discovered this BBS. There's a wealth of good info here.

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72 Chevy K20 LWB, 350/350, lifted, dual shock suspension F&R.
AKA The Beast. Daily driver, even though it's a work in progress.