If the RAS shafts are chromed and has your banana grooves then yes, RAS would have your worlds best shaft. I have never seen a RAS shaft. Maybe Andy F knows if they are chromed like my worlds greatest rocker shafts from Dechellis Machine. My bet is RAS shafts are not chromed in that the chroming process is not cheap and 383/400/440 blocks are not used in 10,000 horsepower applications. I really wouldn't sweat this one out Brad. Your rocker arms will be fine with just about any shaft for your application....