This is my story on PlanetGreen.com
When you perform an electric car conversion there will be parts of the car you will not need. A great donor car is a vehicle that is in need of financial repair on the engine. You don't need the engine anyway so if a blown engine can devalue the price of the car, you save more money!!
One of the biggest parts you will be removing from the car is the engine. Since you will not need the engine, there is a good chance that somebody would be willing to buy a 4, 6 or 8 cylinder engine. They would either buy it for their car or for scrap metal.
You Can Sell Unused Engine Parts from that Electric Vehicle (EV) Conversion - Planet Green