They are so retro, I remember seeing them all over when I was a kid. I don't think I would butcher them up. They are worth more than any bass cab you could make out of them if they are still original.
Besides, in the long run, IMHO, it would be more cost effective to purchase smaller new well designed bass cabs.
They really are cool looking. I remember them at HS dances and teen clubs in the 70's
