msd soft touch rev box's $100 for the pair buyer pays for the ride The soft touch rev control, PN 8728, is designed to be used on standard points ignition or inductive ignition systems. This means that the PN 8728 can be installed on engines with a GM HEI ignition, Ford or Chrysler electronic ignition, any standard breaker points systems or even with an MSD 5 or Blaster FI ignition (non-CD ignitions). The soft touch rev control is adjusted with plug-in modules and is supplied with 6,000, 7,000