The Classic has an electrical pitch control that only a handful of pilots and flight engineers know about, and few practice with it in the sim, but it does work and I recommend you try it. Never know if you will need it.
In the Classic, are you talking about trying to vary pitching using alternate flap extention?
The elevators are powered by hydraulics, with no manual reversion. The stabilizer trim system is powered by hydraulic motors, without an electric reversion. What electric system are you talking about?
Pilot input controls hydraulic actuation of the inboard elevators, and the inboard elevators control the opposite outboard elevator by cable to a hydraulic actuator...There isn't an electric motor to the inboard or outboard elevators, and the motor moving the horizontal stabilizer is composed of two hydraulic motors.
Electric input from the control wheel switches only signals the stabilizer trim drive units to operate, but there's no electricity moving the stab; it's commanding sequence valves for the hydraulic motor to operate, and it's operated hydraulically. Take away the hydraulics and the electric trim switches can be moved all day long, to no avail.
Likewise, the pedestle manual trim levers do nothing more than sequence hydraulic fluid to move the stab trim unit motors, and involve no electrical motors.
With this in mind, how is electric pitch control available? If a trim runway occurs, electrical input to the stab trim can be interrupted by pushing on the control column in the opposite direction of the runaway travel, but the solution there ultimately involves hydraulics, too; the cutaway switches on the pedestle to cut hydraulic power to the hydraulic trim motors. With that cut, or lost...what's left to drive the stab trim unit?