fishy the thing about shaftmount vs studmounted rockers is not that the studstyle cant take springloads its the loss of motion at the valve that is the thing.
im having a friend i always help out at the track,not that he needs help all that much he is a very good at working on cars im just an extra set of hands to get stuff done quicker,anyway he runs a chevy nothing wrong with that but the first time we installed a girdle on his studmounted rockers and while we where checking lash we noticed that there is a huge diference the studs move around alot even when just rolling the engine over while setting lash i dont even want to think about how that stuff moves around at 6000+rpm oh and this is with a mild solid streetroller. 242/248at 0.050" .570/.576
not a bash or anything just giving some food for thought you want a rocksteady valvetrain,lots of power to be made by just having a stable valvetrain.
studmount works and isnt a problem at all it will even take some pretty good springpreasures and still be reliable,just not as stable.