I got a 1999 ford crown vic on 4 tire size 275 25 24 i cut some of the bumber but it sitting to low i was thinking to buy the heay duty shoks with exted i stud in air shock in the back and i want to know what sized spacer i should put on it . I think 2 to 3 inch should do ot just enough when go over a bump in when i ride 4 deep it want be sitting so low . I WILL TAKE A PIC TO SHOW U HOW IT LOOK IT STIITING TO LOW