if you want to rev this motor really high (7000 RPM) then youre going to need it balanced (the whole damn motor) and youre going to need some hella big valve springs (like 150#ers).
unless youre going with a REALLY big cam there is no reason to go this high into the gears. most people would do just fine reving their motor to a max of about 6300 or so. with an XP there is absolutely no reason to go any higher than 6400 under any circumstances and even then i wouldnt go that high just for a little more motor life.
