Albert Champion! He was my great great uncle!
AC in AC Delco Spark Plugs stands ALBERT CHAMPION. Alberta Champion lost control of the Champion Spark Co in 1908 and then started AC Spark Plug Co. Ac was bought out by General Motors in 1909. Reference Wikipedia --Flint East
OEM, AC/Delco spark plugs. The newest part number AC Delco is an iridium plug and is the perfect plug for the I6 4.2 litre
ACDelco is an American company that makes parts for cars and other automobiles. It belongs to General Motors, and its name came to be when United Delco merged with AC Spark Plug.
Most of these were .045 but you should check with a AC spark plug application book.
AC Delco iridiums
60
Resistor
Spark Plugs .035Points .019Plugs--AC/Delco R43N
ac delco 45 or higher
ac delco a541e
.045 gap
0.035 inches for CR43TS or R43TS AC Delco spark plugs