A fella out here in Roma has just completed a V6 + 5spd ex VRII into a Gemini and if I was to use this as a comparison I would be recomending you stick to a 4cyl in the Datto. It was very unruley at the bottom I had a time of it just trying to keep it from lighting up on take off. Up top, very quick but wheight is a defineite issue. Handled like go-kart with an elephant sitting on the front. Wouldn't corner with any grace what so ever and loose as hell in the rear. The POB and COG where all over the place. In my opinion this sort of conversion, though realy extreme fun should be left to 1/4mile straight line driving. Not really an option for street use. But that is just my opinion Good luck with it though