Yes, it is possible. Take in mind, the C-wedges are cast into the tube; there is no tube underneath them, so you can't just cut the wedges off; any bracketry you make will have to incorporate in those wedge shapes, or do as cyclemut did, and cut the tube completely.

A friend of mine has been running his own long-arm setup on a '78 bronco axle. He built mounts, and had someone that welds cast iron, weld them on, so it was done properly. He's been wheeling with this setup for +/- 2 years, now, and it's held up extremely well. This is on his Jeep XJ, with 37" Boggers, dual locked, hydraulic ram-assist steering, dual t-cases, etc. It's a trail-only rig.

However, he only went through the time/trouble of doing this because he already was running a long-arm setup on his D35 axle, and didn't want to buy new arms.

If you were to do this yourself, it would be MUCH easier to just purchase a set of long-arms made especially for this axle, or lengthen & reinforce the stock Broco arms. I am doing the lengthen/reinforcement route, as well as hinging the passenger side. Mine's still a work in progress, but the plan is already in place.