small block hyd. roller lifters

turbodart68 said
The rocker will break under the load required to control the heavy hydraulic roller lifter. Spring pressures are much higher than a hydraulic flat tappet. Also depending on the lifter you will need to bush the lifter bores or the lifter will leak and the motor will have low oil pressure.

I know what you meant.

To be realistic...a stock stamped rocker could handle a stock magnum hyd roller cam with its 80lbs seat and 200lbs open...but that's nothing anyone would go backwards to do.
It's the 300+ lbs open pressure that would kill a stamped rocker, be it roller or flat tappet. Bb or sb stamped rockers...they both give out with repeated high rpms and near 300lbs or more open.