I discovered that 6 out of the 10 holes for the latch /cover were drilled but not tapped. 
Fortunately I have a tap set in the right size.

Fortunately I have a tap set in the right size.
Very strange. The parts manuals only offer 1.22 and 1.62 in the early years, I would assume surely 1.62 is the only one even remotely close to fitting…
Maybe need a set of 1.22’s? eBay will have them.
Thanks for the info. Maybe I’ll try to cut/weld the carrier back to square, then maybe 1.22” will fit. I can always shim with rubber fender washers.
I decided to cut and bend and reweld the problem corner of the tire carrier to try and get it closer to square.
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I also noticed that the lower part of the wheel contacts the lower arms of the tire carrier before the mounting surface sits flush. It doesn’t seem like it should be like that. Maybe that’s due to the extra 0.25” of backspacing with a TJ wheel.
View attachment 123903
So I’m going to try some fender washers on the mounting studs to create a little space back there.
I guess it’s just from getting bent up in the past. I’ve hammered and vise-gripped it into a nearly square shape, put a single fender washer on each of the upper studs and two on the lower stud, and the 1.22” snubbers fit fairly well now.
I’m adding 3/16” rubber sheet to three of the snubbers and I think things will finally be acceptably square and tight so my new tailgate and hinges will (hopefully) last a few years.