Problem removing inner valve springs

fishmens67 said
never ever ever had a flat lobe. I believe the higher rpm's and fluctuating is the lobe killer.
In the 70's it was 1500 steady. lol

Bout every sbc I've broke in..I did at 1500-2200, Chrysler's I do a little higher, higher cam location, more rpm to fling it...and that's how I was taught in my teens learning.