benji, don't waste your money on a new engine, the cases have to be modified anyway to hold the power your looking for, and short of having holes in them, we can use cases in any shape. cranks can also be repaired especially if your looking at stroking it anyways, the main thing to look for is the cam bearing surfaces, make sure these are good or you will need to buy a new head. we modify the valve and seats so they don't need to be perfect either. jeff