Pre-Amp Treatment
Recalibrating the input impedance of the amp so that it will be as good on all guitars, not just on single coil Strats. Changing the input grid resistors to allow more signal to enter.

Changing of the current amp voicing to mimic a Fender BlackFace. By that, I mean to cut back back on the pre-amp distortion, and voice it to give chime-y ringing cleans and mild power tube distortion when pushed.

Power Amp Treatment
Rebiasing of the power amp cathode for a more even break-up at the powerstage.

Addition of grid resistors for longer tube life and and screen resistors to protect against any overload in current.