roller cams for la 360 /questions

how good are the factory roller lifters?
will they handle occasional 6000rpms?
same spring pressures as a hyd flat tappet?
/I believe Oregon cams can regrind my cam for some performance ?
1969 barracuda 3000lbs/ /727 auto with a 3000 stall TQ 3.23 rear 14-inch tires

just looking for a torque tire fryer:steering: