[alanmay0]

I went to a car show today and was looking at some 1967 GTO's and noticed that most had a brake proportioning valve attached to one of the bolts holding the master cylinder to the power brake booster. My 1967 GTO has disc brakes on the front, I believe they are an aftermarket set up but not sure. Anyway I do not have this proportioning valve in my brake system. So was wondering if this is ok or not. The car has power brakes and they work good.

One other question what position is correct for the brake master cylinder lid to attach. Some had the one spring lid fastener that attaches on the front and rear of the master cylinder and other have the two spring lid fasteners that attach on the left and right side of the master cylinder.

thanks in advance
alan