Back half Dart

We'll I've started gutting the car of windows, dash, interior panels, anything that could burn or catch fire really. And I've started building up a 9" rear end. 4.86 gears.

But anyways I'm still debating on cutting everything with a spot weld cutter. Does anyone think the firewall, floor tubs, to the trunk with frame rails is worth anything in one or two pieces cut away from the body?