[Gregski]

I decided I would clean up and decluter the engine bay a bit before bolting on my new intake, carb, and air cleaner, that way I won't get any of that old electrical tape glue and grime on the new shiny bits

so if I may borrow a term from the Import Crowd, I will be "deleting" the Transmission Controlled Spark System, TCS

say what?

The Transmission Controlled Spark System is used on all 10 Series vehicles, C-K20 suburban, G20 Series and G30 Sportvans when equipped with a manual transmission.

lucky me

so what does the TCS do?

Control of exhaust emitted by vehicles using the eight cylinder engines, is accomplished by eliminating ignition vaccum advance when the vehicle is operating in reverse, neutral or low forward gears

sounds great - lets get rid of it