Freds 73 Scamp restore on a budget

I would like to do that on my Barracuda. I think the back window would fall right through the hole. I could weld in some 3/8 round stock. I have 68 Stainless mouldings I can use. Damned I cant even remember where I got them from. 67 has the plastic insert. I thought glued in with a generic vinyl molding and some faux bolts like nascar would be cool.
thought about widening the pinch weld to but the molding might be an issue never checked it out real good.