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Hello everyone, Was wondering if anyone can give me some advice. I purchased the following master cylinder: http://www.mustangsunlimited.com/itemdy00.asp?T1=F71248+01 and do not know if it has a residual valve or not. Since the description says for power breaks, I doubt it does. Is there a way to check to determine if it has one or not? Here is my current setup: No customization and all is stock power brakes with single piston front disks and drum rear brakes...bendix power booster, and the right 69 pedal, distribution block and proportioning valve: https://www.npdlink.com/store/products/distribution_block_and_proportioning_valve_assy_exact-186692-0.html I have replaced the MC with the one indicated above, replaced front brake lines, re-did the entire rear drums including slave cylinder, pads and drums, as well as new front calipers. Here is my problem: with the car off the breaks are hard without having to pump the pedal, which would indicate no air in the system...btw I had gone through a gallon of fluid to ensure no air. When I turn the car on the pedal drops multiple inches and half way to the floor. When driving I slam on the breaks and no wheel lock up, just slowly come to a stop. While troubleshooting, and car running I plugged the rear port at the MC and break pedal drops, but when I plug the front at the MC the breaks are hard with the car running. Will a 10lb residual valve on the rear line between the MC and distribution block help this? Also, not sure what size bore the MC is and mustang unlimited could not tell me. Anyone know or have a guess?

So, I'm trying to sort out all what I need to upgrade my stock manual drums to some nicer manual Bear discs up front, and the same drums in the rear (one day I'll do all manual discs). The issue I'm running into is that I can't figure out what Master Cylinder/Proportioning Valve to match with this combination. As far as the brakes go, I was thinking of either Baer's SSR+ 11.3" rotor kit, or their Track4 13" rotor kit. I'm not looking for anything too fancy as far as this part goes, more for something that I can adjust and that works and isnt too expensive. I'm open to suggestions! Thanks SSR+ http://www.cjponyparts.com/baer-disc-brake-kit-front-ss-4-1965-1969/p/DBF170R/ Track4 http://www.cjponyparts.com/baer-brakes-front-disc-brake-kit-13-track-4-1965-1969/p/DBF164-V/ Wilwood MC http://www.cjponyparts.com/wilwood-master-cylinder-kit-tandem-aluminum-black-with-7-8-bore-1965-1973/p/BMC50/ Baer MC http://www.cjponyparts.com/baer-brakes-master-cylinder-remaster-hard-anodized-15-16-bore-with-driver-side-ports-1965-1973/p/BMC54/