Because of the odd shape of the rear crossmember, I had to use some rectangle tubing and cut it to fit in the crossmember. Once I welded these in the tank brackets I made could sit flush with the crossmember.
Rather than spend $800 on a stainless steel replacement tank for my car, I took some measurements and found that a 16 gallon tank for a 1953/54 Chevy would fit. I purchased it from "Tanks" for less than $300. I made some brackets to mount it in the original location. These pictures are when I was fitting the tank.
I bent and flared my brake lines. The lines run from the master cylinder mounted under the drivers floor through a residual valve and to the front. My friend Clayton made some pieces out of bar stock that we welded into the chassis so the brake lines would pass through the chassis and not over it. The rear lines run out through a residual valve and a proportioning valve.