Yeah with pulling the motor appart and replacing the bearings and making sure to keep engine temps cooler with upgraded radiator and oil cooler you should safely be able to rev higher. The really key part will be valve train. Supertech makes full valve train upgrades. That's what'll be going into mine.
The 93 will go a long way but the meth won't do much for NA without higher compression. In which case e85 will do more for you if you can find a means of tuning.