Is the car original paint?
If so... what is the overall condition minus the few minor rust holes?
How much has been repainted (if any) under the hood and on the chassis?
Has any of the interior been replaced?
How are the floors?
If the car has original paint and it is not in too bad of shape then personally I would weld in the few patches that would be required and then touch up the car, clean it up thoroughly and drive it.
If it is very original it is worth more unrestored than it is restored IMHO,