I don't know the restriction tbh it makes the power but I just can't get it to go higher through the rev range

No matter what I do, cam timing is absolutely spot on for the latest possible power and that's 6-6.5k

It works well down low though which is what I want. I Only have gold cap hydraulic lifters so don't want to be working it much further than my limiter of 6800 anyway to be fair to the poor thing