What did you end up doing with this? When I bought my trailer, it also has Reese brackets on it. Since I only had these brackets, I figured I'd be tossing them and buying a new Weight Distribution Hitch.
But after reading this
Which Weight Distribution Style is Better, Trunnion Bar or Round Bar -- etrailer.com
And seeing this on amazon
Reese 49587 Pro Series Trunnion Weight Distribution Kit - 1200 lb. Load Capacity -- amazon.com
Should I give serious consideration to keeping it?
Or would a full/new 800lb kit be a better way to go?
Reese 49586 Pro Series Trunnion Weight Distribution Kit - 800 lb. Load Capacity -- amazon.com
Just looking at the Airstream Historic Data page.
They have this document.
For the '71 Sovereign
31ft trailer they list it as
480lbs tongue weight
4840lbs total weight
And from the chart that Howard added (thank you very much)
It looks like the 800lb WDS hitch is just about perfect for this size trailer.
Seems like I answered this for my own purpose. (I will buy new 800lb wds)
I hope this was helpful for you..