Proportioning Valve on 68 GTO
For those of you running headers, have you had any problems with the proportioning valve? I bled my breaks before I took my car out for it's first drive in 19 years. The breaks were fine before I left but about 5 mins into driving it I noticed the breaks were getting spongy. I know the valve is way to close to the headers and I will be removing the headers in the future but for now I need to know if any has encountered this problem and had to relocate their valve and if so to where. I have attached a pic of my set up as I bought the car.
Any help would be greatly appreciated.