Can someone explain this port please

George Jets said

And yes, remove the heat riser in the passenger exhaust manifold. We take the butterfly and shaft out, then weld the 2 steel sleeves shut to block the holes.

Now the exhaust will free flow out through the exhaust system, and there will be no hot gasses trying to push across the intake manifold ports with the block off gaskets installed.


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I have headers for it anyways. When you say weld the two sleeves, you must mean the ports on the heads, I tried to have a welder do that for me and he gave me a long explanation about the difficulty of welding cast iron. But I do have a MIG and I've seen some YouTube videos where they show it's been welded, should I just booger it up or is high risk for cracking?