Just to be on the safe side yes up to 2001 will work just fine. As your truck is a 2wd as you posted gear ratio does not matter, pick your poison.
Captain
Hey while you're looking for a rear axle to swap, get one from a 2003 with disc brakes. It's a very easy change, and all you HAVE to do is buy a different E-brake cable to connect to your system. When I did my swap, I also removed my proportioning valve and let the master control the front bias braking. I can help you search for complete axles in your area if you PM me your ZIP. That way you could drive out and pick it up if I locate one close enough.





