'65 Dart No brake lights. Brake light switch failure?

So I took the Dart to a shop to have a Dr Diff front disc brake kit put on.

I get it home and no brake lights. All other lights work, just no brake lights. Brake lights fine before it went to shop. Checked the brake light switch and it's as hot as a pistol and the plunger is not quite making contact with the brake pedal strut. I adjusted the brake light switch so it makes contact with the plunger on the switch and it worked. For a while.

I go out today and no brake lights again. Again, all lights work. Just brake lights out. Switch is making good contact. Checked fuse. Checked bulbs. Checked power to switch with tester. All good. The switch is getting power. I can't see any voltage coming out of switch when I stick a voltage tester probe in the back. It get's hot fast when I depress pedal. So I'm guessing a fried switch? I've never had one of these fail but I suppose it could have fried if the shop didn't disconnect it when they did the brakes.

I found a replacement but not quite the same.
https://www.oreillyauto.com/detail/.../a/14636/automotive-car-1965-dodge-dart?pos=1

The current switch has the power out at the back integrated into the switch (original stock?) This one has a tab to stick a connector on.

Any recommendations for a preferred switch? Do I have it wrong?