Thanks for your additional comments. Here is some additional information. During the rebuild, I removed the foot starter pedal and installed a push button in the dash (just like the first car I ever owned). The first two lock cylinders I installed required some "jiggling" and and sometimes some lateral motion on the key to get the cylinder to actually rotate to the ON position and subsequently to the OFF position. When both of the cylinders finally failed outright, the ignition switch was in the OFF position. I could turn the key, the cylinder would rotate, but the switch would not supply power to the push button.
The opposite is true for the third switch which also required "jiggling" and lateral motions to rotate the cylinder. However, when it finally failed, the ignition switch was stuck in the ON position. I could turn the key, rotate the cylinder from ON to OFF and the engine would continue to run.
The supplier for the first three cylinders and the fourth "free" cylinder is "The Filling Station". This business is conveniently located about thirty minutes from my home. Their part number for the lock cylinder is 47-11582.
Yesterday, I removed the third lock cylinder and installed the "free" fourth cylinder. With some "jiggling" and lateral motion on the key, the cylinder rotates, the switch turns to the ON position and power is supplied to the push button. I'll admit I am bona fide member of the slow learner group--four cylinders and counting all while using the same switch.
Gawd I hate wallowing underneath the dashboard! The old body doesn't bend and flex as advertised. Someone a couple of years ago suggested laying a plank between the floor board and a sawhorse conveniently located near the open door. This little act extends the horizontal surface for a reclined body and it works great.
So here is my action plan. I have ordered a new key cylinder from the Classic Parts. When it arrives, I will replace the "free" fourth cylinder with the Fifth cylinder and monitor its performance. If the fifth cylinder fails, I will replace the switch assembly!! Then, to prove or disprove other notions, I will try using lock cylinders three and four. I will post the results of my findings for everyone to see. Meanwhile, I would happily entertain any other suggestions or comments. Thanks again one and all....
