Ok so you guy's know that I am putting this kit on my 66 bronco that has a straight 6. The bronco only had a single master cylinder on it originally. That being said, am I going to have to install a new brake line that runs to the rear of the truck? Since I did not have an H block on my truck the rear break line just ran to the junction block on the side of the frame. If I install the new proportion valve then the rear break line will not connect to it because it will be too short. What am I missing?