Same exact thing happend to me. Had an engine built and the engine builder put in brand new valve seals, and new valves,springs, etc...it still had AOLT of power, it just smoked really bad. So put new valve seals in the Trick flows, and it doesn't use any oil, and it doesn't smoke at all. You might want to check the valve seals out, as the ones on my heads were brand spanking new. I am not sure to why they slipped down the valve, but a different brand cured the problem.
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