One thing you may want to look into is having your crank beefed up. Kelly at Kms can do it. Having that mod will keep the crank from flexing under a boost which will keep the cases together. There are 2 turbo bikes out there that are making 120+hp, that i know of (hondas). I would use a 48hrs carb with a power jet, or possibly a 46-48mm Lectron.