I am looking for a distribution block that doesn't have a residual checkvalve in it. For some reason no one seems to have a clue where to get one and the only thing GM has is for metric fittings with ball flares.

try:
http://piratejack.net

they have all proportion valves/metering valves/lines etc.

Also e-bay seller kryta has been selling reproduction brass brake parts for lots of different GM models lately. I'm betting they are actually manufacturing the things they sell.

http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback&userid=kryta

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