Could be steel frame
We had a titan/champion 1974 on dodge chassis, it had all steel frame, the box was built very well, rest not so much.
It was a very ugly green, but it was only $250.00, it now is being remodeled as a medical wagon at a local old air base.
Strip the insides out to the steel and start fresh.
Also get a map to write down the locations of gas stations...if that is dodge with 440 there are very few cgas stations it can pass by without stopping, but it really scoots...
Tony & Lori
1989 Country Coach Savannah SE