[Vrroom]

I'm installing 3 levels of theft deterrent on my 1969 GTO. One is electrical and the other 2 are mechanical. The electrical choice is going to be an ignition kill switch, which leads me to my question.

On an engine with an aftermarket HEI distributor, I've been told there are two ways to install an "on/off" kill switch. One is to splice it directly "in line" within the wire going from the fuse box to the distributor. Flipping the switch essentially disrupts the power to the distributor.

The other way is to run an additional wire from the distributor connection point to a ground and have the kill switch installed in that wire. Flipping the switch essentially "grounds" the distributor, thereby keeping it from being able to send fire.

Which way is better?