Dimensions of the typical Keyed MAG/Start switch?

[Brantel]

Anyone got the dimensions of the typical keyed mag/start switch including the size and clocking of the little anti-rotation tang?

 

[Wayne Gillispie]

The hole is 7/8" with 1/8" X 1/8" internal tang at 8 o'clock position(facing panel). I don't have exact rear dimensions, but guessing 2" at widest point. It has been awhile, sorry.

 

[alpinelakespilot2000]

I didn't bother with the anti rotation thing. Just drilled a circular hole. No problems so far.