Are 1990 ford parts compadable with 1997 parts?

No, 1990 and 1997 Ford parts are generally not interchangeable. Seven years is a significant span in automotive design, and many parts changed considerably during that period. Even within the same model, there were often significant changes between model years.

While some very basic, universal parts *might* be compatible (like some nuts, bolts, or very generic hoses), you should never assume compatibility without verifying the part numbers. Trying to use incompatible parts could lead to poor performance, damage to your vehicle, or even safety hazards. Always check the part numbers or consult a parts catalog specific to your 1990 and 1997 Ford models to ensure compatibility.