273 Rockers on a 1971 340

nm9stheham said

BTW, the pressure inside the rocker shafts is very low, like a few psi, so this is not super critical.

Click to expand...

Disagree with this thinking.

Even with the cam timed oiling hole matchup 30 psi is 30 psi and 50 psi is still 50 psi. If you think it's not critical try running your motor with the oil passage part way plugged.