So i plan to install a pair of itr dual vavlespring into a b16 with the head on using compressed air and i was wondering if 1) since there dual do i have to have any special tools besides the craftsman ov. hd. spring compr. i already got 2) yea its noobish but ill have to adjust valves right? (.5-.7 correct?) and 3) will the dual springs work with the stock b16 lower retainer. if someone has a right up on a dual install i would really appreciate it. thanks Joey