Carb gasket 69, 340?

Hi guys, checking to see what is the best gasket for a factory carter carb on a 69 340. Motor has the factory manifold on it and is a street motor, rebuilt to factory specs. The insulated one that came in my carb kit has the wide open center section. Factory manifold has the 4 separate holes. Do I need to go with a 4 hole gasket? Any benefit to using the open gasket?
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