[Seabear]

Don
My wife and I (both 65+) drove Route 66 from Chicago to LA last month in our '88 Carrera. We got lucky with the weather, sunglasses the whole way, but we did run into strong cross winds in NM and a dust storm in AZ. Lots of friendly people on the way, lots of things to see. I can recommend Rennsport Werkstaat in Tulsa for any help you may need with the 911 while in that area, good guys who do good work.
Stop at the Route 66 museum in Clinton, OK, the display rooms each show a decade in the life of the Mother Road. Oatman, AZ is a hoot with all the wild donkeys, the Cadillac Ranch is just plain wierd, fun but wierd, and the deserts of NM and AZ are absolutely beautiful. And, of course, get a photo in Winslow, a chicken-fried steak in OK, and a local beer at the Big Texan in Amarillo.
The really fun driving on Historic 66 are in Cal outside of Needles where you can get off the freeway and put the pedal down, no traffic, good road surfaces, and long straight stretches. We found that the 300 or 3:00 rule worked for us, about 300 miles of driving or around 3 PM we looked for a place to stay and an adult beverage.
Have a great time, it's a tremendous experience, a real slice of Americana.