If the car makes you feel really good when you drive it, spend the money and fix it. If it's just "transportation", sell it and buy a Toyota. You know it's gonna cost you $5K, so you need to decide between monetary concerns and the pleasure (ego boost) you get from driving a distinctively unique money pit. Keeping these old cars running and looking good is EXPENSIVE. If the car is your hobby and you truely enjoy it, then the money is justified. If it's just a PITA, then it's time to move on to something more practical.

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Resistance is Futile.