how is voltage applied to starter
When you turn the key to 'start' a low power signal is sent to the solenoid, aka relay. which is just a switch. The wiring in the ignition is not big enough to carry the necessary power. The solenoid has high amperage 1/0 or so cables to it, and when the key 'tells' it to close contacts, contact is made and sent to starter
this will size up
Same way an F16 works-
Looking for a Used Classic in your area?
CarGurus has 308 nationwide Classic listings and the tools to find you a great deal.
Search Chevrolet Classic Questions
Chevrolet Classic Experts