I bought two sets and haven't got as far as comparing the two. I suspect that perhaps this was a set for the 428 PI with the chrome covers and got mislabeled? Tomorrow.
Technically they fit but 4, 7, & 8 just make it and could be stressed out.
I went to SEMO because they had date choices. Other vendors generally don't and offer to order them for you.
I get the part that these parts are hand made and with something like wire sets can easily get confused.