Hello, I removed this odd box from under the glove box of my 71' 240Z before I sold it. I have no idea of its functionality, but I believe it puts out a high energy spark or something. Its made by a company named Crane, and if you want to buy it off me, shoot me an offer, or if you are in the Santa Barbara area you can come by and check it out. If I have to ship it to you, you'll have to pay the shipping fee.
Let me know if you have any questions, but I know very little about it, and now that I no longer have my Z I have not figured out a way of testing it out.

See pic attached-
Thanks
Mike