Show me your 340 ignition wiring looms/routing

On the dash between the wiper switch and radio.

Fred BView attachment 1715275984
Nice. Some people say its a retard adjustment but if you center it I would call it a timing adjustment. For example if I ran pump gass vs racinng fuel. Would you agree based on your experience? My application would be actually summer heat in AZ vs winter. We run the cars here all year long and there could be as much as an 80 degree swing in the valley depending on time of year. So hot preignition is an isdue. I would love to use it for ping control