273 Mopar Intakes 'General Information'

roccodart440 said

This may be a dumb question but does the 273 take a different intake than the 318, 340, 360?

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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.