Engine is a 1973 1F. What's this hole for?
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X2That's for a thru bolt that attaches to the stock exhaust manifold. It's fine as is. Does not connect to inside of intake.
No this is the intake manifoldDipstick tube. Your dipstick is missing?
Shouldn't I plug it so it doesn't affect intake vacuum?That's for a thru bolt that attaches to the stock exhaust manifold. It's fine as is. Does not connect to inside of intake.
That hole does not communicate with the interior of the intake manifold, it has no affect on vacuum.Shouldn't I plug it so it doesn't affect intake vacuum?