Converting cars to electric is ... not optimal. Cars are built very heavy these days due to "safety concerns". They're also heavy because they're loaded with features. It's very unlikely that you can find a nice light minimalist car that you can successfully convert, but if you know of any, I'd love to hear about them.
The Karmann Ghia and VW (classic) Beetles and Rabbits, that is, if you live in the NW or SW. Otherwise, you'll have to just deal with the heavier cars.
They are not optimal, but more optimal than using gasoline.
