conveniently the 2wd trans is only like 70 pounds, but getting it back in is harder than getting it out...
Hopefully the kit you got has the clutch alignment tool, if not it will save some cussing! Put a ratchet strap over the top of the frame rails and hook it on the bottoms at about the midpoint of the trans, this will let you hold it up and support the weight when you are lining it up. You will have to turn the trans some to get the splines lined up to the clutch plate, and it'll want to stop going in about 1/2" or so from being against the engine, gently walking it in with the outer two bellhousing bolts usually works, but don't force it!