Sister had one brand new came with the 390 but auto .

Following ebay alot i looked at some clean bodied but not restored pull in the 3k area . I also never heard of a K code being avail in a Cougar just the Mustangs . But if it was super clean bottom to top and restored i would guess 10 to 15k but thats guessing not seeing the car . Restored is also to me all new components , suspension , interior and rebuilt drive line .