Steve, there may be a header design that works (inverted or not) or could be easily modified to work. But it takes a lot of research then purchasing a set and trial and error experimentation. That can get expensive if you don't get it right the first time. But there are (or used to be before COVID) shops that will send you a set of plastic snap together fittings so you can design your own headers and send them the mock-up then they'll fabricate a set out of SS. Ain't cheap but cheaper than experimenting.

I should have a yard sale one of these days to get rid of all the extra parts I have from various custom builds where I've experimented with non returnable parts and they didn't work. It'd sure make a lot of room in my shop, and maybe I could finally park all my vehicles under cover.