I mentioned, quite a while ago, that it is throttle by wire. I didn’t want to rely on a cable run out the front, through the tunnel, and over the engine. So I used the drive by wire system from a Chevy truck. The truck gas pedal is mounted upside down in front of the front bulkhead. It is connected to a Miata gas pedal, so that when you push the Miata pedal, it pulls the Chevy pedal arm. Then the Chevy pedal and most of the arm were removed. Here is a photo of the remaining controller.