argg what rev's....
I really don't know as I haven't done a motor in 'yet' and to be honest there's no real solid proof of what rev's does what.
It probably eventuates from poor rebuilds. In your case thats not a problem as you know the motors solid.
Hows the condition of the current oil pumps gear drive? They tend to wear and flatten the metal.
A shade before 7.5k?
Thats quite a bit of rev's anyway, ~60km/h in first, ~105km/h in second and ~145-150km/h in third.
Shaun rev'd Antony's quite hard, well over 7k but it the valve springs hated it so the rev limit is set to 7.2k.
When/how do you want to grab this restrictor?