In the process of getting new brake lines and was wondering if there is a need to purchase a hold off valve. I converted everything over to power disc/disc and a proportional valve came with the kit. Is this other valve really necessary?
Depends on where you mount your prop valve. If you can bias the front to back braking you're probably good to go. Although the two pice brake line that runs front to back is much easier to install than the one piece unless the cars apart already.