its a great idea, but dont be too attached to the one you have if its even questionable underneath for rust or damage. if you are serious take some time and find a good starting point, one with low miles and very nice all round condition then freshen it up. I know a lot more about these cars than when I started, if I chose to sink a lot of money in one instead of new I would make sure the car is pretty good to start.....

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)