so i got the electric vacuum boost ordered today. I think that should give me the vacuum I need. so after calling MP brakes I learned how to fix my valve cover issue. Apparently the booster on pwer brake mustangs in 67 is located a couple inches higher than where the non power master cylinders are. I looked at the firewall and sure enough the dimples for the correct holes are there. so this weekend I will be drilling them out and relocating the brake booster to the proper spot. Also I leaned that there is a different brake pedal for power break 67 mutangs. its a couple inches longer. it too is on the way and should alleviate my problem. Thank you for all the information guys.