475 and 400/400's will be streetable. Not the most perfect street truck but doable. Like said previously tons of tuning and live tuning no doubt.
Looks like your running several swamps parts, I wouldn't hesitate to contact them and talk to them about cams and head porting. Considering they have done a ton of r&d and dyno testing in those regards. With that turbo and injector set up I don't doubt you would benefit greatly from head and cam work.