jeff,
i can have a set of divorced exh port, raised runner 500cfm billet heads cut for you in 6 months for somewhere between 7 and 9 grand a pair. t-ram and valve covers are existing. conventional rocker shaft system already in cad. the beauty of cad is that models transfer directly into cutter paths with mastercam for quick manufacture.
theres enough room on the end margins of the stock 19.75" head surface to house a 4.8 space and 4.6 bores- laid it out years ago just to see if it would fit...
billet crank, rubbed water cores. moved deck features on a billet head. not hard to design- but hard to justify. not sure of the existance of a committed market ...
maybe youll be the first, jeff. gimme a call cometime-
jim
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