Hi everyone, first time posting here so don’t even know if this in the right place. Here’s the deal, I recently found some motorcycle parts in the shed of a house I recently bought. Among those parts there are some Krauser 4 valve heads. From the little research I have done it seems like these are quite rare and interesting. Not really sure what I have hear, or if it has any sort of value. If someone could give me any advice on what they might be worth or what to do with them it would be greatly appreciated. Thank you!