OOPS! DID I SAY CHEVY? I MEANT PONTIAC

No real 64' knowledge,

But from what I do know, below the master, you have a 3 outlet distribution block, spliting the single master out to the front and rear.

I'd go with Inline Tube's 65-66 "B" body single to dual master conversion block. It should keep your rear and front lines line intact. Two lines in, in place of the single systems one. Simple! They list one for the 64', but is says "Call".

No proportioning is required on drum/drum.

You could also use a 67-70 Impala/Big Canadian Drum/Drum - Disc/Drum distrubution block (they're the same). You'd have to adapt the rear 1/4 outlet down to your 3/16 rear line (easy) and your front lines would have to be bent and moved to meet the front outlets, but it would work. And you'd have a failure switch.

I have a couple sitting around if you need one.

Cheers, Mark.

-- Edited by cdnpont at 15:01, 2008-04-14

Hi Lowfen, new member. I have a 63 Strato tudor post. I just did the conversion this past summer. I did not use a proportioning valve. It is not needed on a four wheel drum system.
Also with the newer style dual master cylinder I also did not install an/any RESIDUAL CHECK VALVE in the system, as the master cylinder already as a resiual in the out port to maintain line pressure.
Hope this helps
Dale