Replacing wheelhouses
Are your quarter panels rusty too? You could buy a new outer wheelhouse if they are available for a Scamp. Normally, to mini tub a Mopar, you split the inner wheelhouse in a straight line end to end and then move the inner section up against the frame rail. While you have the inner ones out, you could patch them and put them back since a strip of metal is going to have to be welded in them to widen them. If the quarters are rusty, repair and modify one side at a time. Unless the wheel houses were rusted beyond repair, that is what I would do.