If you follow his link to 67-72 trucks site, you will see the original idea with the complete mounting method, instructions and a finished photo of it installed. The poster there has called the switch by the wrong part number. It is actually Echlin ST6. Sold at Napa. Looks like a good idea.
Further, this business about current draw for an ignition switch or push button switch. IF we are talking an electric solenoid, the ignition switch sees low amps. The draw to energize the solenoid is low. The big starter draw is then handled by the big solenoid/relay contacts, battery cable and battery. The solenoid is a relay just like any relay, the switching activation of the relay is low draw, then it's big contacts inside handle the big draw. The common solenoid has two functions, relay and electromagnetic/electromechanical actuator. (for the starter pinion gear). The auto parts stores can't make up their minds whether to call it a switch, starter solenoid or a starter relay.
We must not be confused by the big honkin foot stompin switch on top of a non solenoid starter. That is not a relay, it does carry a big amp load. That is why is has a big lug that pushes on the starter big lug. That there is a double acting, lever actuated, mechanism. Pushing on a huge push button switch and sliding a gear into mesh at approximately the same time. The ignition switch on that system sees low amps also because it is isolated from the stomp switch. Your foot being the "solenoid". That would be a electrophysiological anatomical actuator. Possibly.
Speaking of big lugs: I did study under Professor Irwin Corey.
