I used a NAPA bought IAT sensor (the same in KB's link) and mounted it outside the airstream mainly due ot the fact that I don't have a PE adder vs. IAT sensor (2000 model year) and for the fact that there would be less heat soak... On nitrous however, the truck would bog on any attempt to activate the N2O. Went back to using the MAF's IAT sensor and all is well.

I don't know if this is due inpart to the IAT sensor not being in the stream of air or what... I know the motor ran very strong off of N2O.