302s on 72 340

oldkimmer said

there was a good write up in the mopar performance manual in the late 80s or early 90s showing that the 302s were a 25 hp increase over the 2.02 valve X or J head.......don't under estimate the swirl ports.......kim.........

Click to expand...

The 1.78 intake closed chamber 318 head they advertised as less HP than 1.88 valve smog head cop car motors? Or the 308- the 1.88 intake open chamber swirl port head they sold as the dream child from its introduction in '89 until after the Magnum's introduction?

Seems odd they'd claim a head rated below the 596s were a HP gain over 2.02 X heads.