Matt,
there appears to be some kind of diaphram connected to the front side of the intake. This is got another pipe coming out of the lower side of the diaphram housing that has been soldered closed. Leaking all around I'm sure. I'm gonna remove the intake and have a buddy mig the intake closed where the diaphram is plumbed in. Unless there's a factory cap or I can get a blanked off intake for the 240. This of course all depends on whether I locate a shutdown lever. A pic was posted on another thread I started. I don't think my son's car has that shutdown lever. I'm hesitant to restart the lump thinking next time the engine might self destruct. It did not overheat! Just used up the "overfill" crankcase oil that I had mistakenly put into the oilfilter housing when swapping out a new filter.

On a side note: I'll probably get a co2 tank for the next time I try to restart the lump just to make sure I can shut it down. I think I have one from a soda machine. Just need to figure out how to plumb it to a nozzle.

Mike