Edelbrock LD340 Intake Manifold Usable Max RPM?

273 said
How much HP is required to be competitive in this class ?
Are similar cid engines spinning 7000-8000+ rpms ?

If you get the lbs-ft per cid up there you can make the power at lower rpms.

That would be best if he could up the displacement but the way I read the OP is it’s also a displacement limited class.

If not I’d jack as long a stroke to it as I could to get the rpm down. I don’t think he can do that.