Quote Originally Posted by NTFDAY View Post
Way back when you could rebuild, more or less, a GM solenoid. You could take apart the disc assembly and reverse the disc exposing the unburnt side. Emery cloth to the 4 contacts, battery, starter, r and s, and you were good to go. The "R" terminal was discontinued with the advent of HEI distributors.
I remember those days!! Many a road side repairs like that in my youth!!!