* The Specific Model: Certain 1950 Plymouth models are more desirable than others. A rare or highly sought-after model might justify a significant restoration investment, even with considerable body and engine work. A common model might not.
* The Extent of the Damage: "Poor body" is vague. Is it surface rust, significant rust-through, or collision damage? Similarly, "lot of work" for the engine needs clarification. Does it need a rebuild, or is it a complete replacement? The cost of repairs will drastically influence the decision.
* Your Budget and Skills: Restoration is expensive and time-consuming. Do you have the financial resources to handle the cost of parts, labor (if you're not doing it yourself), and potential unforeseen issues? Do you possess the mechanical skills (or access to skilled mechanics) needed for the restoration?
* Your Passion: The emotional value of the car plays a significant role. If you have a strong personal connection to this specific car, you might be willing to invest more time and money than someone restoring a car solely for profit.
In short: Without specifics on the car's condition and your resources, it's impossible to say definitively whether it's worth restoring. Get several appraisals from reputable classic car experts. They can assess the car's condition, value (both before and after restoration), and offer a realistic estimate of restoration costs. This will give you the information you need to make an informed decision.