Fox proportioning valve mount question

I am planning on replacing the brake lines on my 90GT and dont see how the proportioning valve mounts to the car, I replaced the brake line that goes back to the rear axle and had a hard time with getting the line loose and figure it might be easier to just remove that one and cut the other lines to remove them from the block.

Thanks but I was just looking for how the stock one is mounted, I found it was bolted on thru the fender well on the drivers side with just 1 bolt.