SB rockers hitting springs and retainers
Bought a set of the speedmaster stainless steel rockers at very good reduced price....
Here they are on a 360 with stock eddy heads, 1.6 rocker ratio. hughes 230/237 cam, lift is 540/558 with eddy stock valve springs..
Duster has been up and down the drag strip shifting at 6200 rpm ...been using them for the last 6 races..with about 30 passes on them....