I take it you didn't like some of the numbers (the FX .61 and the HP .61 for example).
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The HP was the original version, it was actually weaker than the Webra cross ported engine at the time. The later one was almost the same engine as a Webra. My HP Gold Cup .61 will turn an 11-7, can't remember which brand right at 14,000 with an old open front Semco muffler. I suspect it would turn a 12-6 at around 12,000 RPM. The OS FX actually did better than I would have thought. Probably not as well with an 11-7.