anyone modify stock sending unit for intank pump?

My idea doesn't suit your plan but.. While my son was driving a 96 Cherokee we had to replace that electric pump. I took a liking to that setup. The pump, sender, pressure regulator, is all in one assembly.
I did some measuring and found I would need to delete the spare tire well in my 67 A-body and raise the trunk floor about 2 inches in that area too.
I should have gotten some Ohms readings off that sender while I had a chance.
Another wild and crazy thought was could I delete the turn downs by extending the trunk floor to the quarter skins ? I would need a body side molding to hide the line of spot welds in the quarter. I've been considering a 1 inch wide chrome/vinyl side molding for many years anyway. It could all come together very nicely.
Good luck with whatever you try.