My father has a 68' Plymouth Road Runner. I drove it as a daily over the summer whenever I took my truck apart. Has never seen rain since restoration, though. If you get a Mopar get ready to spend $$$$$$. They are coming down in price over the past few years but if you got them before the huge jump in prices they are pretty good investments. Just in my 408(360 magnum based) small block I have just a hair over $10K in it, even doing the labor myself. With Mopars, you have to pay to play!
It's insured for 180 days on the road. The best thing is in Ohio, not sure about you, the historical plates are good for 50 years and only $50 for the $50 years. That's silly cheap and the insurance is fairly cheap also. I'm unsure of the individual cost as he has multiple cars on his plan.
Water is the enemy of older cars. I said it's never seen rain but it also has never seen any water, from a hose etc. Just wax and clay bars. Rust is not fun.