This came up on the 2A forum:
https://www.thecj2apage.com/forums/original-jack_topic46852_post473386.html?KW=jack#473386Mark,
I saw your post over there on 2A also about modifying to use a ratchet.
https://www.thecj2apage.com/forums/found-a-great-jack_topic49326_post501310.html?KW=scissor+jack#501310Does your jack look like this?
https://www.armyjeepparts.com/p-2672-tire-jack-assembly-jeep-nos-m151a2.aspxI like the idea of using tools you already have on the jeep, i.e., adding the socket on the jack so it's rachet ready.
Squidtone,
Any scissors or hydraulic unit that fits in the toolbox should be more than enough to lift one wheel. The "original" style should have a rectangular base vs. the square base:

I used to carry around a rock - mostly for a parking brake but also as a chock for jacking. I don't know whatever happened to that rock......
Now I have a folding chock so that I can keep the vehicle still. I've never had it move before but it's still good to be safe.
As mentioned above in the 2A post, if you're looking for a bargain, consider a salvage yard shopping trip. A small vehicle search should get you a compact unit that will fit in the toolbox.