How many of us are there? Owners of Dodge based RV's?

Hey all, I am a newish owner of a 1978 Dodge Midas RV. I recently finished renovation of it (you can check it out in the DIY page.)

I cannot for the life of me find any specs for this thing, and every mechanic I've been too cant either. Anyone have any idea where I can get detailed information on it? Like basic things such as the gas tank size....

Thanks for your assistance and happy to be here!