Here's an up-close shot of it all. That switch is a “
Universal Ignition Switch” ACDelco Part #D1460 (#12339178). In order to make it fit on the ERA dash you have to file down one of the hard plastic triangular pieces that go between the terminals on the back. You can see on the pic that I've already done that (dark portion on the bottom of the switch, right side). Otherwise the switch hits the "lip" on the bottom back of the dash and won't fit.
