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.
2000 Turbo Zx3
2003 Pitch Black SVT
2000 SPI 220k miles all original THE UNICORN
Focus Revolution Club