Any chance you guys running clutch switches have photos of the install that I could use for inspiration?

Thinking out loud atm, but considering wring up the clutch switch the megasquirt for a bit of launch control action.

wouldn't you just use a brake switch? Perhaps one from a Mini or Sierra?

That was my plan, if I need one, just to plumb one into the hydraulic line

It would be easy if I had hydraulic clutch, but mines cable

My donor fiesta used a plunger activated by a tab on the pedal - not sure what your pedal box arrangement is like to know if it would work for you

Omex do a nice clutch switch with a threaded body so you can easily adjust. An electrical switch for launch/full throttle gear shifts is better as you can adjust when it switches whereas you don't have adjustment with an hydraulic brake light switch