Rewiring my EFI Magnum - 1970 Dart Swinger

If it was me, I would go to a wrecking yard and clip the plug off whatever GM model the switch came from. I would bet you could even de-pin it and slide your wires right into it. I just like having the plugs, wires don't get crossed later and less chance of them coming loose. But $35 is way too much to spend unless they aren't available in the yards.
That would be the way to go, next time I'm at a yard. I like the connectors for the same reason!