4 speed transmission id abody?

It would be swell, when you ask questions such as this, if you'd actually post a photo. One larger than a postage stamp, and maybe one that actually shows the entire transmission. Hint: Cannot see the output

Also, "the numbers" may or may not actually mean much. As old as these girls all are, it is very possible that the transmission is a different box of parts internally, than the case number suggests.

There should be a pad and stampings on the box, but I am no expert on those.

Is it new enough it could be an overdrive 4 speed? Wrench the FRONT shifter CW. This puts the box into 3rd gear if it's a straight through box, or into OD if it's an OD box. Now mark and rotate the front shaft 1 turn. Watch the tail and if it goes more than 1 T you have an OD, if it goes LESS than 1 T you have a straight through 3 speed

Also I thought (on 4 speeds) that slant six boxes came with a 3:1 low. Get the box into neutral, and wrench the rear shaft (not reverse) CW which is 1st gear. Mark and rotate the front shaft and count turns while watching the output to rotate 1T. Three turns is of course 3:1