So just ordered my Stillen SC

Z&I

Agreed ... not 100% accurate, however, with the Frozen Booost and temps down at the IC, the Tuner may be able to provide the ecu with adjusted and closer to accurate numbers.
Not the perfect solution ... but ... waiting to hear from the tuner.

At any rate ... it won't hurt to know the exact IAT - the PLX gauge and module are top notch.

BTW, I did check out the M370 manifold and Air to Air heat exchanger - a nice set up - but the manifold would necessitate reconfiguring/custom designing the SC'r charge tubes, relocating the TB's, and I would have to eliminate the custom bracket brace.
Another deterrent was finding suitable room for proper placement of the larger Air to Air heat exchanger.

Will keep you in the loop

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BB