You can also get and install a auto cranking-start retard box to retard the spark during engine starting.
But try the simple interupt switch. No more burned out starter motors.
Do you have a (Moroso) starter heat shield and (Thermotec) starter heat wrap?
They really help keep the GM starter alive. Does not take long to cook a GM starter with headers.
Some of the start retard boxes are "universal"- stand alone type and work with any ignition (like HEI).
Some only work with a spark box like the MSD-6.
Many but not all add on spark boxes have this start retard function,,, built in
Pretty much any ignition retard box (nitrous, blower, towing etc) can also be used as a start retard.
Last edited by F-BIRD'88; 09-15-2012 at 04:53 PM.