alum. roller rocker life span

Ran a solid cam -

Lift:0.541"/0.522"
Duration (Advertized):284°/288°
Duration (@ 0.050" lift):242°/246°

For nine years with the same aluminum rockers (a decent but not premium set (Scorpion I think)). Changed the valve springs out once about year 7.5. The motor spent most of it's life with a 7400 RPM chip in the MSD 6AL, then the last season I pulled the chip out of the MSD and stuck it in the shift light, and it pulled to 8200. This was for autocross, so the motor would get 4 runs at local events (around 9 events/year) spinning between 2500 and 8200 for somewhere between 40 seconds and a minute 10 or so. That motor is apart now and I won't be reusing the rockers (or the connecting rods), but it was running fine when it was pulled. It also had around 10,000 (juvenile) street miles on it.

Dave