I'm a little confused with your list Salsa. There are only 2 different bolt types. The very rear ones are M12 X 1.25 pitch. The other ones are exactly the same: M10 X 1.25 pitch. Why the 7/16" bolt you listed. Is there a reason to have a little beefier bolt there?
Ok, I typed that list of bolts directly from the AC instructions parts list that came with my body lift kit.
There are 3 different types of bolts as listed.
two are metric M12x1.25, M10x1.25 that bolt directly up into welded nuts in the frame. Those are the rear four mounts.
The other 6 use a nut and bolt that goes through the floor and are accessible by peeling off the plastic covers under the carpet.
AC (performance accessories body lift) went with 7/16" bolts. I didnt argue since it came that way with my kit.
Good luck piecing a kit together.
Save some money by eliminating the follow items.
1. T-case lever extension (just notch the floor for auto, and cup holder for manual)
2. Radiator relocation brackets
3. power steering bracket relocation, just bend up a piece of metal accordingly, or zip tie like a lot of others have done. LOL
4. I am not using my driveshaft safety loop since I have full skids and the safety loop only protected below the truck not above. And I also have to cut my safety loop off since the bolts were seized on.
Good luck.
I'm really happy with my 2" body lift and how smoothly everything went.
Do a search on here for Body lift instructions, there are several REALLY good write-ups on how to do it.
Burn the AC 2" body lift instructions.