Technically,
From 1966 and on no.
But the '273' {1966 thru 1969}, and '318' from {1968 thru 1974}
have small-port Cylinder Heads.
The bigger port Intake Manifolds from the 340 and 360 will bolt on the
273 and 318 small-port Cylinder Heads, but there will be a significant
misalignment between the Intake and Cylinder Head ports.
