About 20 years ago I had bought a 65 Electra 2dr with a 425 2x4. It had the chrome air cleaner ,finned covers I got it from a wrecking yard that was going out of business. It ran very well,and was very original inside and out. I sold it after a few months. At that time there wasn't much internet info available. If I understand it right, they were a dealer installed option? Or did they leave the factory with the 2x4s I always wondered if that was available on a Electra or somebody had just installed it? Was there a code or telltale sign that say wether or not it was original to the car?