I'm running them on the rear of my FJ40. I use the stock spring hanger in the stock location and stretch the frame almost a foot at the rear where I then relocate my rear shackle hanger. I install the 'manche spring pack backwards to stretch my wheelbase. With the front springs installed backwards too it makes my wheelbase almost 104 inches. With a V8 and 22" under the belly it works pretty good...
