Since I want a very low restriction exhaust system, and a car that is easy to work on, I have removed the fuel tank from in front of the rear differential, and replaced it with a fuel cell in the trunk. The new fuel lines will be routed along the sides, inside channels. I will have heat shields near where the exhaust will exit on the sides in front of the rear wheels. This will allow easy access to the complete drive train for changing out to a differant rear end for 1/8 or 1/4 mile strips, or taking a trip. It also paves the way for it to be back halved next Winter.
The exhaust pipes will turn and go through the 3 1/2 inch pipes that go through the sub frame braces and side of the car. This is the area previously occupied by the gas tank.