318 magnum heads

...and either an electric fuel pump and associated return line or a snout extension for the stock cam.

please, for your own piece of mind-don't do the cam snout extender...yes, it works. But, unless they improved the design, I had to get a machine shop to shave off .110" from the cup side so it would work as advertised...add $30 to the $30 you pay Hughes to get the parts in the first place.