I would not. The risk of damage is high.
Suppose the barrels are held in a padded vise, and a wrench is applied to the right hand breech plug's lug. The plug might turn out, but it would probably require real torque to unscrew the plug. The risk is that the right hand barrel will be broken loose, the solder joints holding the barrels and ribs together failing.
To avoid this happening, the right hand barrel only would need to be clamped. The top rib cannot be involved. Just grabbing the barrel in padded vise jaws won't do it. And the barrel itself is rather thin, and is made with rather soft iron. Easy to crush in the vise. It would be necessary to make close fitting blocks to grip the barrel. Hardwood blocks appropriately grooved could be glass bedded to the barrel. This greatly increases the gripping surface. There is still the risk of squashing the barrel. IF the RH plug can be removed, the same procedure (and risks) apply to the left hand barrel.
It is simply not worth the risk.
Clean the barrels thoroughly from the muzzles. Use an appropriate light source or borescope to inspect the bores.