If you want to keep it stock, your best bet would be to contact Jeff from site sponsor FAST racing he could you hook up with everything. Boring the cylinders, maybe a port job if you want, might want to rebuild /true weld your stock crank go oem bearings and seals in the bottom end. Should do the cascade pancake upgrade while it's apart. Keep the stock head, Vforce 4's reeds, keep stock carbs, you'll have a reliable banshee.