Yeah I know,Ii moved my axle forward 3" with out changing the shackle hanger location, My drop box moved the axle forward 1" where I was supposed to mount it then I welded the drop box forward an xtra inch for shackle angle, then welded a 3 hole 3/8" plate on to my perch stock spring pin hole then 1 hole -1" forward and 1hole - 1" back of the stock spring pin hole then dropped the spring in the rear hole for another inch forward 3" total and ass loads of flex. my wheel base was around 114".