If you have a good balanced rotating assy, 7500 is not dangerous if you have the proper clearance's and the cam is still pulling at that RPM. I know with the .624/.624 roller i had with track 1's it was finished about 7200. I've ran a .630/.630 roller with better heads and it would pull past 7500 RPM's. It all depends on how good your combo is and where the peak torque is. If it slows down by shifting at the higher RPM, then obviously the peak torque range is lower. Heck i had a friend running a Nikens and Brown 292" motor that used to come out of the hole petal on the floor 10,000 RPM's and shifted at 8800. Dam car ran 8.80's @ 2350 lbs.
Bottom line if you have the good parts, try the higher shifting points, if it runs faster stay with it, if it slows down just drop the shifting points, your motor will tell you.
JMO
Zip.