Kevin's comment about the added material on the lever is probably right. The electrical contact inside the switch and it's brother on the starter motor wear over time, sometimes so much that they no longer reliably touch when stomped. The correct fix would have been to replace the switch and/or the contact on the starter.

You are already planning to replace the switch. Get a new contact while you are at it. Just Google 821524 stud and a bunch of hits will pop up.
Here is an example that includes the necessary mounting hardware.

New, unstamped with a part number, Delco-Remy tags are available at Chevs of the 40s and Steiner Tractor if you want to finish off your starter's "restoration".

Last edited by Bill Hanlon; 03/04/2025 3:58 PM.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.