[Bored&Stroked]

Something to think about - depending on how "original looking" you want it to look like - is to add a modern Ford starter solenoid (12V, think 60's mustang) to handle the actual starter load and use the above starter switch to activate the solenoid. I've found this tends to make the stock starter type switch last a lot longer as it only has to activate the solenoid.

Obviously your main battery/starter cables have to be setup/routed differently (to go to the solenoid instead of the starter switch above). Just something to ponder if you're wiring the car from scratch . . .