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
'46CJ2A, '47CJ2A, '48CJ2A, '50M38, '52M38A1, '62CJ3B, '62CJ5, '65CJ5, (2) '66CJ5's, '67CJ5, '67CJ101 '69CJ5, '69J3000, '70CJ101, '74DJ5, '73CJ5, '74CJ5, '77CJ5, '78CJ5, '78CJ7, '78Waggy, '83CJ7 (2) '95YJ's, '97XJ...One of them runs, kinda.