When does money outweigh sentimental value? 1968 notchback build thread

I have to say I agree with the opinion that you'll look hard to find a car that is significantly better that what you have, and you KNOW what you have. The surprises will start all over with a different car.
Questions I ask my customers are; Do you have the passion for THIS car, to carry you through the surprises? Do you have the budget to accomplish what you desire?
If you are thinking of selling the car and getting your money back, forget it. Walk away now and promise yourself you'll never regret the decision. If you are building it because you love it and know you'll be satisfied with the result forever and perhaps it will build stronger relationships within your family, go for it. You can't put a price tag on those.
I can see that beyond the long term dreams you've had for this car you've also got quite an investment in parts and labor in the bank. As an unfinished project it has almost no value whatsoever, your losses now are 99%. The value will only rise after you've done a excellent job of finishing it. And even then you'll have to get 60% of what you spend by the enjoyment of owning it.