Spring Relocation without mini tub...

On my 73 dart, I think im gonna run a lynx rear end kit and a mini tub. I want some wider rear tires, but still want to be able to drive it on the street. I am a little worried about exaust though, do i have room? I will be replacing the fuuel tank to a fuel cell (like the way it looks), plus I need it for the hemi...has to be high pressure and return fuel.