I've driven my dad's 2000 S-10 (same configuration as mine except a stepside) and I was OK with the weak power. After a couple weeks, I wasn't OK with the crappy power anymore.
I don't have huge plans for the truck, but merely a few upgrades are in order. With the '67 done I need something to tinker with.
I joined an S-10 forum (I think the average age for the owners of these trucks is 19
) and I learned a lot from there.
The first thing I did was remove the heavy, dragging, clutch fan from the motor and installed an electric fan from a 90-95 3.8L Taurus. I used a complete wiring kit I got off ebay that included an adjustable thermostat and all the wiring and relays I needed. I just had to trim the S-10 shroud to fit around the Taurus Shroud and everything fit well.
I didn't really take any pics of this install... whoops.
Anyway, what it did for the truck was amazing. The "feel" of power was significantly increased. Removing the clutch fan had to "give back" at least 5 hp to the motor. I also saw an increase in mpg too. I *was* getting around 21 mpg city (the same driving was getting me 12.5 with the C-10 and 14 in the Silverado) and now I'm getting a consistent 23 mpg.
Relay kit: $50
Junkyard fan: $40
Extra wire and ends: $10
Not being passed by bicycles: Priceless