Mike at B3 racing.
@B3RE - when he comes back he’ll be notified via the @ sign in front of his name. Click the name and see if he has his web site posted under his name or on his FABO page.
In the case of Edelbrock heads, Harland Sharp as designed a set specifically for that head for us.
Sometimes cheap is t where it’s at.
That said, I have PRW rockers @ 1.6 on my TF heads and Mike at B3 said I can order a shim from him that will make it perfect. The PRW rockers are very good geometry wise on my set up and technically I can get away without a shim. The shim is very thin and offers a slight adjustment to get them dead on. And so I did.
It just makes it that much better on an engine I really never want to ever touch again. It’s in the wife’s Barracuda.
On a set of Edelbrock heads I’m working on now, with Hughes 1.6 rockers, in order to get the action and sweep of the rocker right, it took a .040 shim relatively straight up & moved to one end a bit.