No. It's completely different from a production head; much closer to the W2 in terms of ports. The exhaust-bolt pattern is the "wide" W2 pattern. It requires W2-style rocker stands as well. There are water-jacket core plug openings inside the valve covers, near the lower/outside gasket surface. The only real similarities to production head are the exhaust crossover, valve-cover gasket shape, and open chamber design. Mine are semi-machined, with no intake bolt holes, unfinished guides and seats, and no machining or threading of the rocker-stand bosses. Some of the casting-mold marks were intentionally obliterated in the sand molds before the iron was poured--the marks are
not ground off.
Thinking they were "Li'l Red development heads" as advertised to me, I contacted Mike
@B3RE with several photos, asking him what could be done with them. He was more curious as to their origins than I was, though I was plenty curious. Mike sent pictures to Ray Barton, Rick Ehrenberg, and others, all of whom apparently dismissed them as "just W2, no big deal" after apparently just looking at the port shapes. Bill Richardson immediately knew what they were, as noted in my post, and was very curious as to how they landed in my hands 40+ years later. Mike thought they were too rare and unusual to mess with, not because of any difficulty in making them work, but because they're obviously extraordinarily rare.
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Those pictures were taken with the heads exactly as I received them, other than the dog hair. She's a good dog. :)