Appreciate it.
I did finally figure out that was the kick down switch. Confirmed it is a 400. I can eventually figure our just about anything.....Have always, "done for myself" but this is my first with this sort of project. Literally a beach ball size bundle of excess wiring and components, changing color and size wires. Scotch lock, twist n tape, and dead ends. Spending half a day internet searching info gets a million responses but rarely what you are specifically looking for.
My former garage mates, 78 GMC K15 Sierra Grande stepside, 81 K10 stepside, and 85 K10 Silverado were all bought new. That was a long time ago...
