Eddy rpm heads with arp studs question

^^ That B3 site is a much better source of knowledge. OK if that info of centering is on the Hughes site.... but it's still not the parameter you look at. Roller tipped rockers simply don't have to be centered on the valve stems.. just not too near either edge.

They might be at best geometry be when centered, but then again they just as well can have a wider scrub pattern than they should and so that is not optimum. My son's 340 has the Hughes rockers on Edlebrock heads, and the pattern is near center, but not nearly the minimum scrub width that it could have. So that combination is not optimized, despite being near center.

But hey, if your heads are changing, then not any real issue for now.

Nice trannie!