It won't be an SM465...that's a GM trans. Probably an NP435.
The HP44 front and 30 spline LP60 rear should have ratio tags on them, a little wire brush work and they might be legible, or you can pull a cover and be sure, it's just a little gearlube and RTV. If I had to guess, I'd go with 4.11:1 or 3.54:1
(43) Jeeps and counting....a couple of them run, kinda.