Serious 340 build into 361 HiRPM Screamer

Emphasis will be put on friction reduction, machining accuracy, induction balance/speedstability with the maximum required flow level of about 270cfm, cylinder pressure, oil control, and valvetrain stability. Looking to for a static compression of 10.8-11.0. Planning on using piston, valve, chamber, coatings as well as oil shedding coatings in the crankcase.

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Just curious here, why are you going with roller tip rocker arms rather than ductile iron? Wouldn't eliminating that be beneficial in reducing valvetrain mass and complexity? Also wouldn't that reduce costs and potential points of failure for what is going to be a street motor?