CORRECTION: I went to Autozone for spark plugs and they gave me the wrong plugs, I told them I had a 73' 454 but after searching for 30 minutes they found the right plugs and supposedly I don't have a 454, I have a 409. I always thought the 409 had a very distinguishable valve cover, see pic, not like the straight rectangular valve cover of the 454, see pic! What's going on here?
