As far as streetability with the 3L there aren't any issues with anyone I know of so far. Check my web page in my sig. My car isn't making massive horsepower it probably has about 240 to 250 crank hp. I drive mine everyday and Demon's car seems to be working fine although I'm not sure if he drives it every day.
1999 3.0L Cougar: 220fwhp and 200tq
2003 VW Passat W8 with 4 Motion AWD
http://www.cardomain.com/ride/300644
PM for intrest in 3L SVT Contours, 3L swaps into your current car, Prepped 3L engines, or anything 3L related.