Best 273 and 318 builds (NO 360's please)

Rat Patrol said

Sorry to disagree KO, but that result has been established as not just a "happy" Dyno result...but clearly "hysterical".....

I refer you to 71340 post - basically the same as SD and made 70 HP less.

No-one I know of has ever got near that 400 HP result with the same or similar build - and that includes using better heads.

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I've personally done 360hp out of a 318 (321 cu .020") with Magnum heads and a small 205 @.050" cam , 9.1 comp. I dont see why 400+hp is difficult with good heads and a larger cam.

I have spoken with Steve Dulcich and met him several times. I asked him about this build, and why he would perpetuate this myth of the '302 cylinder head. He actually laughed and admitted that people seeking out the '302 head was mostly his fault, after I told him I thought they were total garbage IME.

Now for the good stuff: Those '302 heads were ported with an extremely high level of skill. I have no doubt that the JJ engine made every bit of 400+ HP. Those heads in the article didn't make it off the dyno ! They were ported so aggresively that they began leaking water in the short side. I have worked on those castings exactly once and managed 189 cfm from a stock level of 153cfm--BIG DEAL! They still didn't make any power. Everyone needs to forget these heads and move directly to a Magnum casting. J.Rob