The Stovebolt Site Forums The Shop Area Driveline 3:55 Ring & Pinion Time Line

Alvin's estimate is realistic, if you have done this before (with my notes/comments/suggestions in italics, below):

1/2 day to tear it down (and clean all parts)

1 day to let a pro do it (1/2 day if you do it (with a friends help) - if you have done it before)

1/2 day to put it back in at most, if you have done this before, and all parts are clean.
...... depending on how many suds you have either before or after the first 1/2 day
no more than one beer per hour - lite beer (yuck) if you must drink beer on-the-job

The dial gauge and stand is available at Harbor Freight, Northern Tool, online search (eBay, etc), etc . . .
Prussian-blue (or, equivalent) is available in small tubes at most auto stores.

Most likely, you have read Sweet's Tech Tip on Stovebolt.com?