I'm attempting to stay away from a theoretical debate about whether an LD340 and 750 cfm 4150 will physically make power at 8K RPM and, instead, am trying to get real-world feedback on the RPM ranges people have practically used with an LD340 on a race 360. To this goal, I'm not following your point but am open to hearing your input as it relates to my specific build. Where do you think a practical RPM ceiling is for this specific build considering it's a vintage class.