My '69 CB350 is currently out of commission, and with my current time restraints, I don't think I'll be able to finish the rebuild for some time. Someone is selling a '72 CL350 in good condition for a good price, but it doesn't have a title, so I couldn't get it registered. Does anyone know if these engines are interchangeable on the frames, or would I have to modify engine mount placement and such to make it work?