Substitute Marvel Mystery Oil for one quart of engine oil. Monitor the cleaning process through the oil fill hole. Run it til the next oil change if you want to.
Spark is actually supplied by the coil. The ECU fires the coil after knowing the CPS is sending the correct signal.
As stated in my write-up on CPSs, you don't necessarily have to get the full .5. .35 may work.
Chop 1 inch off each of them. Then, drill a half inch hole as shown in the photo. The flat side of the flute that’s closest to the edge of the valve cover.