While I'm not sure I'll make the rally in 2018, you've definitely added something to my bucket list! As far as the mileage confusion, onhundred80 has it correct. 35503 is the last part of the VIN. I assumed that meant that was the number it came off the line but the links provided ZERACER, it sounds like that may not be the case. I can already tell this you guys have done a fantastic job of organization of data here. Kudos!
And to pizzaguy, I can tell you and I think a like. While you may not see me in Carolina this October, here's some minimal proof.

I'll admit its a crap pic, but I'll get my profile together at some point here with some better images.
To my knowledge (the first 260 miles were the original owner, my dad was the 2nd) the car has never seen winter nor rain for that matter. He kept stored in a garage with no windows and covered. No other items other than the trickle charger were stored in the garage. In fact my 7 year old daughter has been calling it the "crayon car" given the cedar interior and the fact that.....well it smells like crayon. Always has since we owned it so I assume its just the materials it's made out of. Who knows maybe I'll find some melted crayons in there.
Thanks again for all the warm welcomes!!!