Archrms,
I recently converted to a combination of start button and toggle switch and did away with the keyed ignition switch. For security I added a hidden kill switch in the cockpit. I also added a doo dad called a Battery Brain Type III. It hooks up to your battery and is designed to protect your battery from being drained to far when the engine is off. That feature isn't particularly important to me, but it also comes with a key fob remote that allows you to connect and disconnect your battery via the remote. My battery is in the trunk which I now just keep locked all the time. I figure this combination is about as secure as a keyed ignition switch. Just hope I can remember how it works each time I take the car out!
It's not authentic, but kinda fun. Throw a switch, push a button, and you're off!