to use the stock Vmax frame you have to cut the rear case section (take apart the engine) as well as make an adapter to bolt your sprocket on to. Of course you need a swingarm, custom wheel, and some frame and gas tank modifications. I have a different style of conversion as well that doesn't involve maching the cases but it won't fit in the stock frame without a lot of frame modifications. I do have 2 chain drive engines and one chain drive swingarm laying around if you're interested. One of the engines is a 1570 block and trans only. The other is complete and a 1500 longrod engine.
Sean Morley