3800 was what I have seen in some of the various FoMoCo lit.
Jack stands will be more than adequate when used properly. (no need for railroad ties) %)
I have three sets of the orange 2-ton (I think thats what they are, they look like the ones in the pic above) import type like you get from HF, Northern, etc. and I have used them to support my F-350 PSD, Broncos, and even the rear of our Volvo semi before.
With a pair of these, you could theoretically support 8,000 pounds (two Broncos completely suspended), so to have a pair holding up the front or rear or to have four holding up the entire vehicle is well within their limits.
The only reason I have thought about geting the ones rated higher is that they are often taller which can be nice sometimes.
Beware, there are some very light stamped ones that will not take much of a side load before they could be distorted. These typically have a bunch of holes and a pin you stick though to adjust height. The ones with the cast adjuster and welded stamped frames are generally heavier duty and hold up well.
There are some higher end that use the pins as well, but not as common.