Could you give the model number of the intake manifold? Also, where around the carburetor is this hole(s)? The front, rear, side? If its open to water and you want to block it off, if thats ok to do, just get some square head bolts, and pipe tape or glue, and screw them in nice and snug.
On our edelbrock intake manilfold, I do know theres a hole behind the carburetor, and its a vacumm line that goes to the tranny.
But for better help, please post the model number of the intake manifold.
- Shane
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