Hope this helps. A few features noted from this time period
- no toe pad
- Quarter panel cover carpet only trimmed on top edge or not trimmed (serged) at all (reproduction stuff from the 70-'s started the trim all around the edge thing)
- Outer edges trimmed (serged) on front and rear sections
- possibly each rear corner near inner rocker may have carpet screw to retain the loose corner of the carper. Check for original hole for screw seen in picture #2 below
Hope this helps
Poor original picture - building a 65 Shelby possibly one of the three October builds)
Slightly later example