If stock rockers and stock length valves are used, it should be fine. But, if it's good enough for a roller rocker, it's good enough to have good geometry. That roller tip changes the geometry so drastically, I won't let anything leave the shop without being corrected. I will recommend a stock rocker on a mild build every time, if the customer isn't willing to make the necessary corrections for a roller rocker. So, yes, it is common, and a matter of course in my shop. I've seen too many broken parts to want that liability on anything I build.
