welcome to the site..
as far as modding the svt.. bolt on's dont do much.. SVT did a hell of a job squeeezing every hp out of it. I would recommend looking into seeing if the timing belt was done, then mounts, pretty much maintanance... doing a tune would be the best aftermarket mod to do. performance wise shy of going boost.
Come join us at FocusFest 2015 in Memphis, TN!
Purchase your goodie bag and t-shirt at FocusFest.Com
Follow us for the latest info at facebook.com/focusfest
You don't want to miss out this year!