Did some more on the tubs. I used the old metal I cut out to shape the bottom of the tub form (out of press board),
Then turned it around to form the top curve of the form. Which came out like this.
This is how it ended up inside the trunk against the angle iron edges.
Once I'm happy with the fit I'll form the wall of the tub on the form with an extra 1.5 inches over the top. I'll use the form to bend and hammer the top overlap over the top of the form to make the top angle. Then I'll form the wide curved tub by laying it over the top of the old wheelwell still remaining. And span across over the form with another added 1.5 overlap. I'll bend and hammer that edge over the form again forming two overlapping edges that will get tack welded together once everything is in place.
I hope. I did that on my '67 Nova years ago and it turned out well.
Mark L