My father in law is coming up here to pre-move some stuff and is driving his '69 chevelle all the way up from So. TX (approx 1700 miles), refuses to tow it or have it transorted. This is a perfect cherry car with 40K or so original miles on it. He is all freaked out about the altitude, which will vary between at or below sea level (what the car is used to), 10K ft on the passes and a final alt. here of about 4,600 ft. He thinks it needs a carb rebuild prior to or during the trip. I think the thing will run fine, but am looking for some other opinions so I can reassure him that all will be well.