[grumpy]

REDSC400,
The NARROW HIP cars came form the AC shops one way and the resulting DIFFERENT shapes came about after they were sold/raced from personal choices, repairs after damage, or the tire size changes happening. The "design" group at SAI set out to accomodate the wide oval tires that were just being made available for the performance crowd so they came up with the WIDE HIP Cobra 427 with no "rolled out" lip around the edge. The problem, HALIBRAND could not get the wheels manufactured so after a short run the body reverted back to the NARROW HIP rear so the small tires and wheels didn't look so silly and got lost in the larger wheel well.

result; There were only two sets of bucks at AC so there were two sets of flares directly related to those bucks. NARROW HIP or WIDE HIP.