Routine maintenance is never a bad thing to neglect. Exchanging belts, hoses, filters, brake parts and suspension devices just before they fail is also in an anti-mechanical breakdown program and allows safer driving.
Arguably as important to your car's value is interior and exterior restoration. Things like weatherstripping, window channels and trim pieces get tired over decades, causing noise, leaks and discomfort.
The 1956 Ford Thunderbird is no ordinary old car, it's a collector's dream. Each year, car shows, collectors and the like pause to honor the Thunderbird for its one-of-a-kind blend of power and retro cool.