There were changes to the rear crossmember of the frame, lower and narrower transmission hump, [ really not that big of deal] . Tailpipes no longer exited out of the back of car, again not a big deal if your not building factory stock. The hubcaps are close, but were different for '60. Power steering pump was now mounted to motor and belt driven, not driven off the back of the generator as in '59. Other than those few problems, it's a great kit, one I've waited 30+ years for as my dad had a red Impala 4-door hardtop with a 348 when I was just a little kid !