well i have a 1998 4x4 supercharged with the urd kit. the urd kit by the way is way better than the 7th injector kit, the 7th kit is just a toyota cover up for running too lean. my truck dynoed with 31"tires and no gear modifications, with a 5spd. manual with 240rwhp

and 262rwt

the new 4.0 comes with 245hp at the motor and 268torque at the motor. so the supercharged 3.4 being in a smaller, lighter truck should beat a 4.0 stock. i havent raced any new tacomas yet but there have been a fair share of morons with hemi's and the like thinking they can just tool on me, but have nooooo idea lol. obviously supercharging the 4.0 would be the way to go. reports of supercharged 3.4's with the 7th injector kits had in the 220's for rear wheel hp. so if youre comparing a s/c 3.4 with a stock 4.0 then go s/c 3.4 for sure.

hopefully thats not too confusing and you get something out of it