Please Help With Early A Body Bucket Seat Identification

A friend of mine has a 65 Dart GT Slant 6 with a factory 4 speed. It is a cool little car. He wants to order Seat covers for it, but he is not sure the bucket seats are the originals. I will give you exactly what he gave me. Any help determining if these are the correct seats, or maybe slightly different year/model but the 65 Dart Legendary covers would still fit would be much appreciated. Pictures first, then the data he gave me. Thanks.
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Seat back:

height 23"

width @ hinge 20.75"

thickness @ base 3.5" @ top 3"

pleats are approx 0.5"


seat base:

width 23"

front to back 22.5"

thickness 4"


Mounting holes on base:

side to side 17.75"

front to back 12.125"

The seat covers look like this:
64/65 BARRACUDA & 65 VALIANT BUCKET UPHOLSTERY - BLACK | Legendary Auto Interiors