Lanny,
Back in 2002, I had Edelbrock heads on my play engine with roller tip rockers and the stock covers did work. But I think that Tim is right, and for a full rocker set up you may need a taller cover. But, heck that was then. Perhaps someone has figured out a low profile stock-styled cover nowadays that will accommodate full rockers...or the other way around, a full rockers set up that fits under a stock valve cover.
Back in 2002, I had Edelbrock heads on my play engine with roller tip rockers and the stock covers did work. But I think that Tim is right, and for a full rocker set up you may need a taller cover. But, heck that was then. Perhaps someone has figured out a low profile stock-styled cover nowadays that will accommodate full rockers...or the other way around, a full rockers set up that fits under a stock valve cover.