340 MANIFOLD VS MAGNUM MANIFOLD ?

Treblig said

Never tried it on a '74 but it work just fine as long as it's not a early A body. I plug the small gas ports below the exhaust ports.

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Yes my car is a 68 barracuda and the engine I will be putting into it is from a 1974 truck.
I was curious about the manifold from the Cherokee mounting tightly to the head. Also strange thing but my heads do not have the small gas port holes below the exhaust ports