Master cylinder issue

I am installing disc brakes on my 1966 Galaxie and during the process, I must have pushed the brake peddle down with the rear brake lines attached
and the front brake lines not attached. The master cylinder is working the rear brakes but not the front. How do I "re-set" (for lack of the correct term) the master cylinder so both chambers are working? My master cylinder is a newer dual chamber type from a four wheel disc brak Lincoln. I ran my test light to teh brake switch on the proportioning valve, and the test light lights up, confirming the fact that I pushed the brake peddle with the rear lines connected and the front disconnected.
Here is my set-up;
Front spindles, calipers, and discs from a 72 Torino Rear calipers with emergency brakes from a 85 Cadilac Seville Rear rotors from 85 Lincoln Master cylinder from a mid 70's Lincoln Mark Proportioning valve from MP Brakes - GM style All parts, aside from the spindles, are new or remanufactured
Thanx in advance
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You probably need to bleed the master cylinder, in this case just the forward port(s). Bleed kits come with many new master cylinders, and consist of 2 short plastic hoses with plastic fittings. Screw the fitting into the port(s) and route the hose back into the fluid reservoir. Pump the brake until you no longer see air bubbles in the hose. Make sure the reservoir is full before you detach the hose and reattach the line(s).
Bob
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