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I worked at Ford in Material Control for many years known within the company production activities as (Parts Control). Sometimes part number prefixes can be deceiving. Occasionally new model parts have been pulled ahead into the current model for various reasons...
One way I found to work out the quarters was using layout tools - "contour gauge" and measuring different points from a good quarter. Use strong thin cardboard (i.e. a file folder from Office Depot, Office Max). Take a sample about one inch apart, transfer the shape and label the cardboard...
I inherited my Dad's 73 ragtop that has never been restored. The original owner had it rust proofed and the body is in really great shape.
However, this past summer the car was placed on a lift. When the wheels left the ground, the rocker and quarter separated on both sides at the seam...