Sixpack on a 318 engine ?

My opinion only:
A few cubes difference between a Ford 302, Mopar 318, and a 327 chevy, doesn't mean much. The difference is, there were real performance versions of 289/302 Fords, and REAL performance versions of the 327. That is not true of the 318, and it's reputation suffers.
Put equivalent hi performance parts comparable to the 365/375hp versions of the 327, you should get comparable results. Trouble is.... Mopar never did.