1965 4-barrel intake

Just curious if your 273 has a single or factory dual plane 2 bbl intake.

If it is a dual plane they give good low end torque, and they make the simple 2 to 4 bbl adapters by Mr. Gasket to work with the existing 2 bbl manifolds to get your 4 bbl on there. They work quite well, surprisingly.

The nice part about your 2 bbl manifold is that it matches the small port 273 heads, so no turbulance there. Good port flow is key on the 273s/318s.

Enjoy . . .