I collected a list of questions I have been asked. I think this about covers it all, but if I missed one, just ask. The vehicle of choice depends on what you want it to do. Porsche 914 conversions tend to be quick and have excellent range, but they aren't much good for hauling a couple of kids to school. Volkswagen Rabbits have room for passengers, but can lack pizzazz.
Mini pickups can handle a lot of battery weight, but tend to be rather heavy.
Basically, what works for me may not work for you. There are a few general rules. Look for something lightweight with plenty of room inside. Try to avoid anything over 10 years old, because parts availability starts to drop off. Just because a vehicle is free or inexpensive, doesn't make it an ideal conversion.