Anyone wired a self latching or other type of anti-theft kill switch ?

DionR said
The thing is, if there is any power under the hood at all it only takes about 4 feet of wire to start the car unless it is something like removing the coil wire or similar.

Doesn't mean it wouldn't slow someone down. They would probably need some time to figure it out unless they came knowing you had a kill switch.

I went with a battery disconnect myself.

Painless disconnect

Battery relocated to trunk, inertia switch?

Here is one I didn't use but there is a link to a place that sells one if you wanted ideas on how to wire it.

[FOR SALE] - 110 Amp Latching Relay

I'm rewiring the whole car the battery and fuse blocks and relays will be in the trunk, under the hood will be very minimal wiring. Was thinking of run two kill switches fuel pump and starter relay hidden in different spots, plus thinking of a way to use some kind solenoid to lock the ratchet shifter in park.