Neutral safety switch

Probably a better idea to make sure you can "crank" is to bypass the starter relay completely "for emergencies. Buy a good heavy duty starter button, and RESOLVE NOT to use it routinely.

Hook it to the battery stud and the solenoid terminal of the starter relay. That way, ANYTHING can go wrong with the crank circuit, and if the starter is still good, you can still crank it.

I would not brag to tech inspection about this. (I'm sure you know, NSS is required) Might be good to hide it up under the dash, etc.