I'm going to disagree with everybody on here so far.
Don't DD a Grand National.
1) A good, lower mileage, near stock example will set you back $16K at least. For that money, you can get something thirty years newer that gets double the gas mileage, has better A/C and stereo, is faster and handles better, is MUCH safer, and doesn't need maintenance beyond oil changes and brakes.
2) These cars are hard to insure for DD purposes. "regular" insurance will only insure you to a really low wholesale book value, likely close to $10K. Any agreed value policy that insures you for what it's worth also limits mileage driven.
3) Despite what people like to say, these cars are not reliable compared to modern cars. They require constant care and feeding to keep them in tip-top shape, and some parts are getting hard to find. When something fails, it's more often then not going to result in an upgrade, not a simple trip to the parts store for a replacement (MAF Dies? You need a new Chevy MAF and a translator, not just a new MAF, for example).
These are great cars, and a properly maintained one will indeed be reliable enough to stand in for your DD if you find yourself in between cars or the real DD has an extended stay in the shop, but running it continuously at 12K miles a year will not go well in the long run.
