Intake Manifold leaks Coolant- Could it be too small??

Bob Watkins said

Engine is a 74 Dart 318. The block had both locating pins for the heads, no locating pins for the manifold- should there be pins for the manifold?

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THe stock manifold had pins in the front and rear walls (between the deck surfaces) Most aluminum intakes aren't drilled for those pins and can caust sealing issues. Just spit ballin' here.