I Think It's Done

I'm now looking into and planning my next motorcycle. Remember, I have quite a few production motorcycles but I really like working on them (mine - not yours) as much as riding them. Maybe that's why the bikes I've chosen to collect are tuning nightmares! The built from scratch thing really does it for me. I've considered doing some alloy casting for the next project. I might go so far as to cast a block and other engine parts. If I can source a vintage engine, I would really like that as well. If any followers know of any original older engines suitable for such a project - single or twin, I'd be interested in a lead.