first of all, 22R and Torque dont belong together, because the 22r only had around 90-110 horsepower rating from the factory! the only thing i know to tell you is try a cold air intake, and a header! you can Ebay these for maybe just a little over 200 bucks! the little tire idea will not increase you torque at all, it will just make the truck slower on the top end! it will be a little faster off the line though! good luck with your upgrades, there are not many aftermarket options for the 22r however
www.lcengineering.com makes a AWESOME selection of stuff for this engine!!!!! just be ready to fork out more than 200 bucks!