An update here. My friend had continuing issues with this engine, he has now replaced the intake manifold. He told me the old one had evidence that someone did some metal removing and one side is not perfectly flat. He will hopefully drive down to Homer on Sunday for a show. This will test it.

1941 Chevy
"First rebuild - complete!"
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1941 GMC resting peacefully
1946/1947 Chevy Street rod on s10 frame complete
1945 GMC panel truck in line for restoration
1941 Plymouth stock complete
1941 GMC COE in restoration process
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1941 Chevy Coe uncertain future resting now