W5 Heads & 340s

These actually are shaft mounted rockers if I'm not mistaken. It's been a few years since I've looked at them honestly.

i doubt they are. Mine were the jesel sportsman rockers for W2/W5.. the cheapest ones( no Jesel’s are cheap..lol)
I doubt the professional series would be shaft mount, when even the more budget friendly ones were not
Might be wrong..but.... i ran them for years, most definately not cheap, and not shaft mount