Tunnel ram or no tunnel ram...

Not sure I understand what you meant here? Are you saying if your motor peaks at 6000 then 7000 would be 'high'? It's really a matter of opinion I guess. I'm calling above 7500 high and expect to be there with my new junk.
Yes, that's what I'm saying but that's personal.
If I had max wedge heads or bigger and a big cam I'd expect more rpm but my lil bit bigger than standard ports are just running out of steam, so I see no real reason to push it much harder