My very soon to start *new* 55 is going to have FJ60 rear springs in front and the 63" chevys in the rear. My leafed 55 flexes as good as any with no links or the issues associated, but I know I can sweeten the pot some more. PLUS, I have driven my SOA'd/36"/Swampered FJ55 over 19,000 miles this calender year already! If your looking for an "easy"/"comfortable"upgrade... go SOA with stock springs. I am going longer, and a little stiffer as I haul my FJ41.25 offroad trailer with the rest of my junk quite often... best of luck- Aaron
