My pressures are quite a bit less, 125lbs. on the seat and 360 lbs. open. Hyd. flat tappet .546 lift, true street car. Drive it from coast to coast on 89 octane. My guess is that the rockers will live for awhile , but I would check them regularly. While I am not really sold on the idea of roller bearing rockers, Harlan Sharps do seem to be the best short of T&D or Jessel. I think Sharps are made of 2024 alloy which is also very good. Like 7000 series it is also used by the aircraft industry.