8.8 swap

Whats everybody using for a proportioning valve with the xploder rear disc setup?

The plan w this car is M body spindles with M body 2.75" calipers in front w 'doba 11.8" rotors and caliper mounts. M body manual master cylinder with firewall adaptor, and stock xploder rear brakes. I have a 74 duster tubing kit from inline tube, and a double flare tool so rebending and reflairing ends isnt a big deal, plus i have a bag full of new SAE fittings.

I was thinking of plumbing in an SAE thread GM type disc/disc proportioning valve. I can get these for about $40 each.