FBO box took a dump. I think

How are you using the car? Hot street/track use a couple of times a year? I like the 6AL so you have a rev limiter, and you can run almost whatever coil you want (the compatibiltiy list is pretty long!). If you had to replace it, you could visit a Pep Boys/Auto Zone/O'reallys and get another one.

Unless, you just want to get the FBO box replaced--how long did it last, by the way??? And where does your charging system usually run while the engine is running?

David