First, I wasn't correcting you...just passing on info to help you learn about these awesome cars. The mileage is awesome but there were many, many, many six cylinder cars. Restored six cylinder 66's go in the 9 to 11 grand range. $7,000 to $8,000 would be more the range you're looking at. If there are issues that could still be a high price. I would go over the car lock, stock and barrel and look for any hidden rust or obvious rust you can find. Any amount of rust just means a LOT of rust later. It's a perpetual cancer on old cars. You don't want to spend a ton of money and then have to redo all the bodywork (even if it looks nice) at a later date. We're not trying to discourage you at all... just want you to be educated and prepared.
Cheers and keep us posted... and of course get some pics up!