For CALC.DAT you could use IAT or some blend of IAt and ECT (with IAT being dominant).
I don't think EFILive have the time to revisit the Vortec (what you see is all they found back when)... do you want me to ask...?
( hmmm, this means it becomes difficult to do AutoVE )
How does vehicle run with the Calc.VET corrected MAF and calculated VE...?
( notice I use the words "corrected" and "calculated" with specific semantics )