The Victory would have had balancing issues with a lighter body:
- it had a double octave neck,
- not set that deep into the body for better access,
- but even more importantly: it had extra steel rods in its neck (in addition to the truss rod) to stabilize the neck. That is why those Victory necks are so incredibly sturdy and stiff (without being overtly fat). You also notice it in sound. A P-Bass is livelier, its neck resonates more, Victories sound kind of deadish (or "focused" if that is your preference), because the neck doesn't really move at all.