Everything I've read indicates the chassis were built and purchased in bulk and sat around for years as the RV companies used up their existing stock.

Quote:

My 79 Dodge Van factory service manual shows everything for a 440, as well as a 'metric' inline 6 cyl. diesel (weird!). Obviously printed before the models actually came out.




In 79 there was a 6-banger diesel available in dodge half ton trucks. A mitsubishi diesel I think. Was a $$$ option over a 318 and had less power too. Very few of them out there.