.........cut off switch...........

My set up may be a little different than most. I have a Denso 60 amp alternator that does not have a voltage regulator but I don't believe a regular OE type alternator will be much different in this case. I also have an MSD so I got rid of the V.R. and ballast wiring. Last, I have a terminal buss/stud on the firewall that connects everything together. The alt. output goes to the stud and everything feeds off that. In addition, I also have a remote starter solenoid which kills the large wire to the starter when not in use.

I admit, it's a little complicated but once I figured it all out, it became clear. Rob (crackedback) actually helped me out when I did it.

Here is what my battery box looks like. The starter solenoid is the black one, the CD solenoid is the chrome one. You can see the large red wire that goes to the starter coming off the starter sol. The CD sol. is only on when the cut off switch is on, you can see the smaller red wire going down to the switch. The larger red wire coming off the B+ side is to the terminal on the firewall. The large B+ cables go to the switch on the positive side per NHRA regs. The smaller blue wire is from the dash and is wired to the switch - it kills everything on the dash including the MSD. The yellow wire goes to the old starter relay in front to energize the solenoid on the starter. You need this if you have a mini starter - the solenoid will burn out if you keep it energized so that is the way to keep it off when not in use.

On the switch itself there is a jumper wire to connect the individual sides together. When the switch is thrown both the large and small studs turn on or off. If they are off, they are off, nothing is feeding it because both solenoids are killed with the switch.

You really can't do this any other way. I'm sure there will arguments like "you don't need to go through all that, you only need to yada yad yada". Trust me though, I went over and over it trying to make it less complicated but you can't, it won't work like it's supposed to.