The breather that I have on the valve cover was blowing out smoke the same time it was coming out of the timing chain cover. After it warms up the smole gos away for both. I dont know about the tube from the air cleaner part.

The motor has been in at least a couple of vehichles. I believe it originally came out of a Spirit of 76 Impala and last I knew was in my friends pickup truck and now is in my pickup truck. Between the minor mods done to it and just getting around the motor does not have much of the OEM stuff with it.