We admired the attempt to reproduce vintage cars, which are highly valued in affectional and sensibility terms, as clean eco-friendly cars in these modern days, by transforming them into electric vehicles. Notably, as vintage cars normally have simpler structures and systems than do today's cars, replacing engines with electric motors is a rational practice. There is a future plan to make kits for particularly popular models, and provide services for them at lower prices. We expect that this project will lead to a new path showing an example of the way to maintain cars.