Yes, we put them on a 124 with a Hi-Back seat. For us it worked well. Our yard was not the smoothest, but Dad has fixed that over the years, an I am 6'4' so the extra leg room was welcome. It did make it ride better, but it seemed to get more "bouncy" than the wideframes with the same springs and seat over the same rough area. I would say "do it", but I would put the brace on also.... I think we did....