Crash Beam

If you could totally remove the beams i.e. cut them out completely, the 73-76 door would be slightly lighter, not by much. The interior handle assembly and inner door framing is slightly lighter. Also if you swap doors you will need to swap to the 70-72 rear 1/4 window steel inner panels to match the doors, which adds a little weight, again not much though. If it was me I would attempt to cut the beams out, but then again I have no spare 72 and earlier doors nowadays.