Do they all take this much grinding? Tons of grinding on the ductile rockers then when you get it to clear the spring and retainer the 3/8 PR is pressed against the side of the PR tube

I am building it for a friend and he wants it to hold up at 8000 RPM so I am a little leary to run a 5/16 PR.

Everyone kept telling me when I build a W2 I won't want to build a SB with anything else but this is a real pain