Thanks Bimmer! I appreciate that. 
Everything that I have seen so far points towards faster lap times with the wing, except on the Nissan Roundy Round.
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True, but the 'Cuda's rear wing is, um... unique, shall we say.

I didn't get a chance to really get into these cars over the weekend. I may this week, I may not. Regardless, I have a Camaro built and I will convert my Cuda later today, so I'm ready for any online racing.
PS: The reason, IIRC, that my Cuda lacks a wing is that it was built out for one of them fancy dancy ( <- Sarcasm) series-type thangs, and they didn't allow Aero. It is one of my better setup cars, so I had never really thought about changing it.
I wonder - should I use the same build and tune as on the non-aero car, or should I bring the tune down from B or A class...
We can still use the front wing, right?