Yes - Mother Trucker sells an excellent 3.55 Ring & Pinion Set (and, I think the old instructions).
Maybe someone will post a link to an installation parts set (bearings/seals/gaskets/etc necessary for a good/tight installation, and, no noise when running).
A few tools/gauges are need - Harbor Freight and others sell them.
There may be more information on-line (I will check the Tech Tips
here - have you checked them?)