Here's a reply from a similar thread
Car Security on the Datsun Z site that I frequent.
[quote author=Retro Z link=topic=13962.msg147262#msg147262 date=1392787720]
I was thinking of most of the above eg alarm, club lock etc. But have decided i will design some kind of quick release removable gear stick and leave it parked in gear.
Or a chain/wire cable bolted to the tunnel/seatbelt mount which clips to the shifter to hold it in 4th or reverse etc. And another chain or cable to lock the seat in the reclined foward position.Not entirely theft proof, but would give the person a hard time along with the other security measures.
[/quote]
I like his idea of locking or removing the gear shifter.
The flame throwers may not pass our annual safety check though.