I own a shop, a drag car & truck, and what I think is this: I haven't seen many 2.3 T Stangs run at the drag strip, but I sure see a lot of 5.0 Stangs. The reason "must" be the 5.0 are faster, or there would be more of the 2.3 there. If you build a 2.3 T, and do some upgrades to it, then it can be made to out run the 5.0's, but do the same to the 5.0's, and you have a 10 second car pretty easily. If it was me, I would invest in building a stroker engine for the Stang, and you would see a pretty awesome ride. I know this because I have to race them all the time. They are quick.
Glad to help out, Good Luck!!!