Most roller rockers dont fit any of the Edelbrock heads correctly. If you take any of the commercially available roller rockers, you'll see they are way off on the sweep pattern. Most people say " they worked fine for me", but in fact, they havent ever properly checked the roller tip sweep. This also stands true with some of the small block heads out there. Will they " work" ? Sure. Did you check the valve sweep? Probably not. Simply, they will open and close the valve, and for some thats ok. I like to have the geometry better fitted. I have had, used mocked up, ran, broken, diagnosed about every rocker set up out there. They all have their good and bad points. As far as Eddy roller rockers, I had Harland Sharp make rockers that fit the RPM heads correctly. The only ones I havent used are the newer Hughes rockers, so I cant say on theirs.
I do a fair share of Eddy combos and I can tell you that most of them need some correction or a rocker that is suited for them. ( to be 100% correct).
When Crane went under, I started working with H/S on a new unbushed rocker. I was using BBC blanks, and was correcting both geometry and oiling, to better suit Mopars. During that time, it appears a parts house decided to come out with a non bushed rocker. I decided to not persue it after I find that out. I wasnt going to compete with them on that platform, as they typically want to sell things cheap. I had a better design, but it was going to put my sell price above theirs, and I wasnt interested in fighting for the sales. I think they basically copied Crane, where as I was making changes to make a better piece. I corrected geometry, improved oiling, and went with hi quality shafts. Nuff said.
RHS iron SBM heads fall into the same category. Take just about any rocker out there, and you'll see nothing fits them correctly. The bets fitting rocker for them, which is almost perfect is the Indy rocker believe it or not. I deal with these things in circle track applications, so I see what happens on them.SB Eddys are the same.
Long story short, check the valve tip roller sweep.You'll find issues most likely, and you'll want a set that fits correctly.
For a simple hydraulic cam, you may just end up using stamped steel rockers, which will work typically fine for street use. I use an assortment of shims when using the stamped steel on Eddys to better align them, and tighten them up a bit across the shafts
