Is it possible or safe to put a lift on a torsion axle?

I bought an old pop up camper. Have it tore down to just the metal frame and I'm about to begin brushing the old rust down and prime and paint it. Will probably have to end up getting a new axle. Right now it has a torsion axle and I don't think it will be possible to change it with a regular leaf spring axle because the trailer is almost all channel tubing.
My question is.. Is it possible or safe to lift a torsion axle? The trailer itself is approx. 6x9 but at the moment the wheels are set in the trailer. This makes the main bed area much smaller than I'd like and I am not wanting to make the bed lay horizontally. What would be a good option here?
My question is.. Is it possible or safe to lift a torsion axle? The trailer itself is approx. 6x9 but at the moment the wheels are set in the trailer. This makes the main bed area much smaller than I'd like and I am not wanting to make the bed lay horizontally. What would be a good option here?