I see so many conversions where a patch panel is applied over the old overhead lights... *see attachment*
I've got a buddy that's got a high end hot rod shop and I watched him use a pneumatic panel flanger like this to install patch panels
Also, I searched and they've got several models of vice grips with the dies welded to the jaws
not knocking anyone's build
, but it just seems like if you've got an air compressor and a welder.... it makes for a clean patch.
Harbor Freight has a flanger for $40 with mixed reviews
Air Punch Flange Tool
just an idea
personally, I have to use what I got!