I have a 91 lx mustang with a 306 that is a street/strip car. The car runs mid 12s but i was wanting to get springs that will lower it around 1" to 1.5". i have Strang 10 way adj. on all 4 corners. what would be the best spring to get that would be good for the street and the track. i looked at the eibach drag springs but they dont lower it and dont want to cut them down.