I ran across a 1973 Cougar XR-7 convertible for sale near me. What are the common problems to look for in these models? Do they have the cowl leakage problems that the Mustangs have? Do they have the Torque box rust problems like the Mustangs? Are ther any problem rust areas to look for? It has a 351 Cleveland engine, any common problems to look for with this engine? Supposed to have 58,000 original miles, power top in good shape, excellent running with no mechanical problems, solid floors, trunk and rails, excellent interior, some surface rust in quarters. What would be a ballpark price for a cat in this condition if all the above is true? Thanks for any advice.