Are 340’s rare

You have some fixed notion that your way of building a “streeter” is the golden ticket. It’s not. It’s your fantasy of what a “streeter” is.

RPM is your friend.
Thank you for the words of wisdom.
I've had three cams in my engine and can tell you that your notion of rpm being a streeter's utopia is fullofchit.
For every minute of rpm a street engine sees on the rev-limiter, in second gear, it will likely spend many, many hours at under 4000 rpm. and if the Bottom end sucks for lack of cylinder pressure, well, that is your fantasy.