Well Matty89 if you want to use it as a daily driver then patch's work but if you want the car to last then panels are the way to go.
First the header panel can be fixed in the car as well as the holes in the floor, but the truck is another story. But and l say but, you can fix trunk if you cut the rotten rails off, ofcourse remove gas tank, then fix the trunk with a panel as you'll need the body mounting framing. Then undo the forward body mounts and raise *ss end up to weld frame horns on. When you raise *ss end remember about the wiring, as in don't lift to high.