Changing intakes

Marcohotrod said

a friend had the same intake, we drilled the holes with a hand drill and bolted it on his 340 with 2 Carter 500s, ran good

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I was wondering what size drill bit you used to drill the holes out on the intake.But on the one i got i put the gasket lines up with the intake and i put it on to see and sum of the bolts would go in and tighten up and sum were off,So i thought i would drill them out bigger.Thanks for your help......