That is a nice number for a 428 Ford BBF and I am sure a lot of work went into those heads.
As for $6K for a total assembled kit I disagree as the intake does not come in the kit and a standard Ford intake can be re-used. But of you read carefully you will see the Jessel rockers ($2200), new custom headers $1500) and some other pieces are not in the kit so the $9K or so figure is actually accurate.
These look to be GREAT heads but the conversion is just to expensive for the average Ford performance user in MY OPINION! That's the reason they are not selling boat loads of them!
Hey pdq67 I do not mean to bash your MODERN idea or your contributions to this post. I am just trying to give some idea and thought to how the some good cost friendly excellent performing heads and intakes could be developed for some reasonable dollars that would not need exotic (expensive valve trains) and could use existing headers, valve train, valve covers, valve sizes and simple intake manifold designs to make it less expensive and easier for SBC & BBC enthusiasts to reach 750-900 HP without putting them selves in financial distress! These heads are already in the market from a lot of aftermarket head companies but their current limited production and special high end racing users keep them up in stratospheric dollars!
As for Pete Ardema, I have known and had some direct person to person conversations with him over the years and his one off heads type production and use don't put them in the class of mass product I am proposing. Again if they were the "Answer", Pete would be busy building hundreds of them.
Those reading and absorbing this thread should understand that if moderate cost heads and intake systems that are going to achieve this type of power levels and be used in the bigger mass market they are going to have to be simple high quality parts that are produced in large quantities at very affordable prices! that's what makes, justifies and sustains production and sales of such products!
Not to be critical but my guess is that small outfits like Hammerhead and Ardema have probably sold less than 25 of their systems and that ain't gonna cut it! JMO