Thanks!
I got confused because looking at the color samples on USA1 Industries' website, the 75-76 sample looks darker than the 73-74 sample. I couldn't understand why the color would be different for those years, and I didn't want to spend $40 for color samples (even though I think highly of USA1's products).
https://www.usa1industries.com/1973-...it-saddle.html
https://www.usa1industries.com/produ...at=1147&page=1
Maybe they have two different samples because the carpet style changed from loop pile to cut pile.