Also with the tuner you will need a wideband reading in order to get the tune correct. You can either have the truck dyno'd to get the air/fuel ratio or buy a wideband guage with a datalog capibility in order to get the correct readings. I am running the MI singleplane in my truck and it works really well with my setup. But I am running a cam, large valve heads, 2200 stall and 4.56 gears. I have never tried the Airgap, but with a closer to stock engine it may be a better choice.

 

All I can say is I love my AirGap and SCT.