Anti Thief devices.... what works

I have the 66 dart sedan with the slant. There have been a few cars stolen lately near my house, so I am interested in some sort of affordable device to deter a thief. I would rather not drill holes into the hood and install pins. Is there any sort of lock you can put on the existing hood latch?? Ideally I would like to be able to disconnect the coil, then lock the hood. But I am open to any good ideas.
I was also thinking about using the parking brake, and removing the handle?
Thanks for any advice.

Also any good battery disconnects that aren't too bulky?