Well, according to Factory Five, the 818 is the cheapest and probably easiest one to do. It is more practical and probably pretty dependable if your donor Suburu Impreza car was decent, and imagine if you go the route of electric, which would be even cooler. I guess two outfits in So Cal do the electric conversion (EV West and 33 Machine). If you haven’t already done it, order the free nice color brochure from Factory Five and you get a dvd. One thing to look into is whether CA still limits the registration of these kit cars to still 500 per year. I don’t know if frankly that allotment is burned up quickly or not.