My plastic battery box was knotched for the bolt-on WDH saddles would fit on my trailerFinally made it to the Cat Scale and then went to Camping World. My hitch weight was 720 lbs., quite a bit more than the 520 lbs. listed in the brochure but that's with the camper and Tahoe loaded for camping. So, based on that, I went down to Camping World and bought a whole new EAZ-Lift Elite WDH hitch with 800 lb. spring bars (same brand as the old obsolete one that had unknown bars and components) so now I at least know what I have and can get parts for it!
One issue I had with the new hitch assembly was that they could not install the new saddles (the part that attaches to the frame that the chain is hooked up to) due to the design of the A-frame box. I will need to modify either the box or weld the new saddle to the frame. The advantage of the new saddles is that they have a safety pin you can install after cinching up the chains- the old ones do not. I'll try and post some pics of the issue if anyone is interested.
Almost ready for camping!