1.) I find that oil smoke is sometimes mistaken for steam in some contexts. 2.) No, but I do appreciate it. If you didn't already have engine swap plans, I would have suggested just to hone and rering the engine you have. It might have been a crap rebuild or it could have been the break-in. Many people have convoluted one-size-fits-all rituals for doing so that involve lots of running with minimal load. It's a holdover from the slider cam days. Couple that with modern materials, machining, and oil and it can result in unseated rings. Got a new roller cam engine? Put the boots to it.