Re: bump stop shocks
I have about a half dozen Bilstein Catalogs, including the most recent race catalog, and none list the wieght of the oil. Bilstein appears to only sell it by the gallon and it's part number 194131. You probably don't want that much so when you find out what the oil properties are, got to a motorcycle shop and get fork oil there.
As for the nitrogen (don't use air, it carries corrosives) it's adjustable based upon the weight of your truck and your use.
Somebody at ORW can probably help, but you have to get the right guy. Same thing at Fiber Tech in Santee. There's one guy there (who's name I forget) who knows that stuff. they also have a nitrogen filling station. I'd call RaceReady in Chula Vista and talk to Bob or Daniel. Or I'd call one of the fabrication places. H&M is pretty close to you.
I haven't had good experience with Bilstein's 800 number. There is a direct line out there, and I used to have it, but I can't find it now. Maybe you can get it from ORW or RaceReady.
When you find out, post it, I'd like to know, George.