Andy, go to the Painless Performance Products web site . click on accessories. PN# 50105 high output solenoid shut off. I think that could be wired into your key switch for total shut off.
I don't think I need a cutoff switch since I'm not aiming for 9's and I have the battery under the hood.
I'm just going to use the key to shut things off. I'm also going to use a Ford type solenoid so the starter wire is only hot during cranking. I think that is pretty safe setup and should be NHRA legal for 10's.
