Eaton rear/drums input.

[tmills213]

Here is the background.

1964 C20 camper special.
292 4 speed swapped to 383 th350.
2 pc driveshaft and what I beleive is a eaton h072.
245/75/16 wheels/tires

Got everything back together and have been driving it around but it is running a little high. at 50mph it is around 3000rpm.

I figured it had a TALL gear since it had a camper but calculators bring it out to about a 5.62, ridiculous. I finally pulled the cover and the attached picture is shown. 36 teeth on ring and unsure on the pinion (cant see it).

Trying to do the rotate and watch the driveshaft revolutions but found one drum is slightly hung up. I can still turn but it is noticeably harder than the other.

my questions:
-what are the possible ratios for this setup (4.11 4.56 or higher?)
- how the heck do you get the drums off, have to take the axles out?? does that require just doing the bolts on the hub and then the two in the pumpkin?
-general input is appreciated. flying solo here with just enough knowledge to be dangerous.

thanks