started doing it about 20yrs ago. Is there magic in this swap? NO! Of course if your running a solid valvetrain you need adjustability,but for a simple hyd setup I wouldn't waste the time. Recently (for a customer) went from the factory rockers to a very sweet set of Crower stainless enduro rockers 1.7 ratio and saw little to no gains on the track. There are easy gains and not so easy gains to be had.
