Generation IV External Engine - Nick Williams DBW and TAC question

I have an 05 GTO and was thinking of picking up the Nick W. 102mm tb. I am curious to know if will I need a TAC module if I go to this Nick W. unit since apparently the TAC module on the GTO is in the TB itself? If so, does it matter which TAC module I get, or what is the best one to get?

TIA

The throttle control is built into the ECM. You will have to make sure that the NW 102mm you get uses the LS2 90mm internals for it to work on your car. You may have a problem if they are using the internals from the newer LS3 90mm. I believe that TPIS makes 2 versions of their 102mm.

Thanks for the info.