2176 intake over 318 Head

Also, I don't have the photo anymore, but some manifolds are made in the front so that the front lip of the manifold creates a larger hole than you'd expect. You need a BIG bead of silicone front/ rear, and apply this, then IMMEDIATELY set the manifold in place and snug it down.

Take a towel, or your finger, and smooth the silicone bead front rear before it skins over. Take a light/ mirror, and inspect UP towards the bottom front of the manifold to be sure you have "a good bead."