340 valiant build advice needed.

May I ask what the appeal of 7000 rpm is if the engine doesn’t make power up there? An engine designed to operate at 7000 likely isn’t going to be happy in cruiser status, and the amount of effort to make one live up there (oiling and valvetrain modifications) isn’t worth it for cruiser duty. If I was charged with building your engine I would have you sit down and seriously consider adjusting your goals.