Salt on the roads

I'd re-focus my dollars on getting a 95-2005 model econmical daily driver front wheel drive vehicle considering that you seem to have ice, snow and bad weather durning the winter.

Putting large dollars into an old mopar then driving it in the salt all the time is just counter intuitive to the longevity and quality of your rare hard earned machine.

Until you get a 2000 honda hatchback civc with snow tires, try this:

http://3mcollision.com/3m-rust-fighter-i-08892.html

Steam clean the underside and then spray the entire underside and all internal frame tubes. Down inside the trunk where the quarters meet the floor pan over the wheel well-quarter area, trunk to quarter area.

Alternatively and non-enviro method: Soak everything with pump sprayer full of used oil, used atf and 10% diesel, several gallons.