360 Intake Manifold

Manual so no torque converter, it's an M1 single plane. It's an inch to short across.

You are doing something WRONG!! PHOTOS!!! PHOTOS!!!! PHOTOS!!!

Post a photo of the bottom of the carb, the top of the manifold, and the carb gasket beside /on top of the manifold

Post the Holley PART NUMBER. Is this a spread bore?

Does the manifold have two sets of bolt holes? See below