Thanks for the replies. It looks like the LCA's are the main culprit on forcing the car into SM. As well as the other stuff too.
I think I will take your advice and continue to run it as it is in SM and not really be competitive. I don't plan on de-modding, especially taking off the watts link! The car was mostly set up to do track events and time attacks, so I'll just do the autocrosses for fun/practice.
And I forgot to mention I do have Maximum motorsports camber/caster plates, and the car is already a track pack (can't believe those LCA's were already upgraded from base model mustangs, they looked junk to me).
Sadly, the Track Pack LCA's ARE upgraded over the stocker units on the base models. The stamping is similar (basically identical) but there are some stiffening plates and the rubber bushings are a higher durometer. My understanding is that they are still better than what came on the base model, if only by a little bit.
And as Cito said, Autocross, no matter your desired level of competition should ALWAYS be about having FUN! If you are not having fun it isn't worth having as a hobby.