Nice job! It's the Torque mainly that kills the Liners, etc. if you keep Torque below the danger level (+/- 450-500lb/ft) you can make plenty of power without the cylinder pressures becoming too large.
We have also gotten some high power figures out of stock blocks and to do so we have used a tapered boost (low to high) profile. I think you can ramp the boost up from 6000 rpm going to redline to lift the torque there and power figures accordingly.
Anyways... it's a good result you have there already. More boost at redline would just be icing on the cake