Inasmuch as RPO 687 got changed to Heavy Duty Brakes & Steering in 1960, can someone explain why the JG carries the 58-9 HD shocks forward and labels them for 1960? I realize that the April 1960 Parts Book also carries tham as 1960 and that a number of racers bought the 58-9 shocks OTC and used them, but you won't find them in the AIM and it seems to me that they should also not be in the JG. Have 1960 BB owners been taking deductions for this? Comments, please.