Not sure either. I got a printout sheet from dealer of that section of system when I picked up a TB gasket and It referred to that as only the maf. I wouldnt want timing advanced because of nitrous but may be worthy for non juiced N*.
My only qualms about those older tricks is that the PCM'* have become so complex you might be making it do other things to compensate for what you think is a good improvement.
Also would want highest octane possible if your mod is feasable, Knock sensors might overide your jumping IAT with a resistor.
And ya it would be pricey to replace If ya fubar it. The TB gasket alone was $46
Remember you've stepped into the realm of Caddy part pricing for our drivetrain.
There are wires running through the dual air box and maybe IAT is inside first box??
I'm gonna take it all apart if I ever stop coming up with major mod ideas