One of the reasons I don't like the current crop of "work" trucks is they've brought the rails up to armpit height, so high you can't easily reach inside to grab something, and also so high my
Scamp 5er would have to be modified to fit underneath.
You'll have bust the welds holding it to the frame and attach some additional box beams to lift the trailer so it'll fit, and re-attach the
axle. I'd call Scamp to find out just how much height to add.
You might also look into the age of the
axle. If your trailer is 20 years old, the
axle is probably starting to sag, and it might be more cost effective to replace the axle while it's already off.