Re: What mirracle addiditive to stop smoking
That could depend on why it's smoking.
I just went through that with a guy on the Jeepster BB. Turned out it was a plugged oil drainback hole in the head -I think it was a 360 though.
They get plugged/gummed up sometimes, then when the engine runs, oil puddles at the back of the head because of the slant of the engine. Then that oil puddle runs down the valve guide into the chamber.
Cure's easy, remove that valve cover, run a coathanger or something down the holes. Replace cover, enjoy.
I'd missed that on his and ended up going round and round checking other things - because I thought those heads were the open style with lots of huge passages down. Turns out they are small holes. Your engine may be the same with small holes. He just had something stuck in it.
It's worth a look, costs nothing.
Let us know how it turns out.