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you cannot use a predator head,, and you cannot use a millenium head or any stage v head for that matter

if you want to run ss/am, or a/sma,, you need to run parts with numbers from mopar

a/sm and ss/am stuff that are fast are small blocks,, but i dont think you can get there with a small block without alot of money,,, the p-5 hemi is dead since there are no "new" available head castings

your best bet is to get a hemi 99 and destroke it some,, run it like that then build a new one with a small bore,, and build a 420 inch motor or so

if youre serious about this i may build one over fall/winter,, i can share ideas with you if you are doing one too

lloyd wofford has a b/sma stratus that has a patterson 358 p-5 hemi in it,, it make 950 or so and runs about .45 under,,, since there are no parts available to build a "better" motor,, there are thoughts to build a hemi 99 around 400 inches for it,, and move to a/sma

jeff

Jeff, MBE has ads for P-5 stuff on their site. Maybe the castings are from down-under.



Details

MBE’s P5 Dodge Hemi is a great example of an engineering exercise taken to the extreme. The Hemi is are already famous for great power production, but MBE has created a next-generation design that combines the raw power production of the classic with the latest advancements in induction theory to create what MBE owner Matt Bieneman calls, “the most efficient cylinder head that we sell, period.”


The P5 Hemi utilizes every trick in MBE’s extensive book to create incredible flow potential. This head features valve angles that MBE keeps confidential, and when equipped with Jesel’s rocker arms designed especially for this head the pushrods angles are perfectly straight. The chambers can be sized anywhere between 25 and 45 cc’s and are cut to accept 2.280 intake and 1.600 inch exhaust valves.


When you combine all of those factors with MBE’s top-of-the-line ports, the result is a jaw-dropping ability to deliver air and fuel into the combustion chambers. We’re talking about 460 cfm through the intake ports and 287 out the exhausts! And remember, MBE is the only induction specialist in the industry willing to guarantee its advertised flow numbers.


This is the cylinder head that helped Comp Eliminator racer John Edwards set E.T. and mph records. The ability to flow big numbers means this head will really separate itself from the competition as the rpm’s climb higher. On the engine dyno, it has been used to produce a proven 1,100 horsepower on a naturally aspirated 395 cubic inch engine at 10,000 rpm. This cylinder head is a great option for any race engine between 340 and 460 cubic inches, especially if your goal is an engine that keeps making power at rpm levels the competition has long declared to be “past the redline.”