[Alan Roehrich]

I do not agree. If you take an engine equipped with stock shaft rockers and large diameter lifters, and replace the stock shafts and rockers with 8620 or 8740 shafts and big roller rockers, you can EASILY exceed what can be achieved with stud mounted rockers and no stud girdle, even WITH roller rockers. Otherwise, there's be no market for stud girdles, and there'd be no shaft rocker conversions.