I'm surprised, I ran my 2WD S-10 with the 2.2 all over hilly Western PA when I was in college installing satellite dishes. Studded snow tires, a couple boxes of coax, equipment, tools and ladders strapped to the cap - 1,000 lbs? I had no problem going anywhere even in the worst storms that had snow packed on the roads - I joked the engine didn't have enough power to spin the wheels
My god that thing was slow but I have a soft spot for those little trucks.
I don't know how familiar you are with Pittsburgh but the first time I drove it loaded up on the Parkway East I was headed outbound towards Monroeville on that steep hill between Edgewood/Swissvale and Greensburg Pike and I thought the transmission was slipping it was so slow! It had to downshift to second to maintain 60 and was barely able to keep speed. I bought another one out here and loaded it up with tile when we remodeled the house, I was trying to get on the 10 going up a ramp with the AC on and wasn't sure I was going to be able to get it up to highway speeds!