Modifying And Welding a Cast iron head

Dick Landy used to do a hell of a job reworking old heads with the port window raised to nearly the valve cover rail. The floor was welded to raise the bottom of the port.

This amount of work and result is something along the lines of what your thinking.

The thought of this idea would require a steel insert and welded accordingly, not brazed. The problem would probably be fitting in the boxed tube or more precisely, opening the head up that far due to the water jackets.

Go for it, let us know what you find and post up pictures!