Ok this may turn out to be a very dumb question. I have a couple of engines I would like to break-in this weekend on my break-in bench inside my garage. I'm doing this because of very low temps outside. Has anyone done this and what did you do about the smoke. Is there anyway to rig up a piece of hose to pipe exhaust and run it out a window. This would cause a back pressure issue wouldn't it. Need some input and your thoughts.

Thanks,
Worm