Did some reading and i cant seem to find any discussion about useing the rear leafs from an fj60 in the front of a 40. From what i understand the 60 rear leafs are 47 inches from eye to eye, but have an offset center pin. I currently run 55 springs in the front of my 40 which have a centered pin also have shackel reversal. Was thinking it might be a good option to gain a few inches of wheel base. Any thoughts? Experiences?