I think the 74 is the year between the cat hump and NOT, and when you order it, you get a cat-hump carpet. Others have had good luck with the Trim Parts carpet. The secret is apparently buying a 73 or older if you have no cat, and a 74 or newer if you DO have a cat hump.
can you send some pic and let me know what patterns they are ? I do knot know to much about carpet.thanks