Charging system and other wiring change help needed
What is the problem with having current back to alt as long as the switch shuts the car down(per NHRA)? Is it that if the car should be involved in an accident that a short in that wire could cause fire? How does that differ from a factory original wiring?
There are many that do this. This leaves (depending on your wiring) what can be a very large, no 8 or larger, "hot" wire all the way from the battery up front to the alternator. Even something "as small as" no 10 is certainly large enough to start a fire. It is difficult to fuse something that large, because of the nature of alternators. One that is charging a dead / down battery for a long period might cause "nuisance" tripping blowing of a fuse / breaker.
My "scenario" is that you had a crash, upside down, whatever trapped, and fuel leaking, etc. There you are with this nice big no8 (or larger) "welding lead" that migiht be sparking
The NHRA rules makes some reference to "kills all power" or some such. In my opinion, leaving that wire is against the spirit of the rules, if they were not worded better.
So far as the linkage working, etc, don't know. I have no idea how many types of switches, handles, linkage, etc, there might be.