I would love to have a built up Turbo I6. Then you get to say "ya its a T code still has an I6, wanna race"?
My opinion is that the steering and suspension upgrade of the V8 have as much to do with harder driving as the weight difference alone. Same with the rear.
Although its nice to see a 4 lug I6 from time to time I really don't see any cons unless it was some low mileage survivor.