I'd vote for typo. That seems very odd, to say the least, on the Canadian vs US 69 numbers for the HL covers. I originally asked the center grill question due partly to a post in the old form on the subject. It was regarding SS/RS black vs. chrome (horizontal) grilles on 68's. Rich answered the question but did not supply any dates. It looks like the 060 grille was the "part" for both the 67 & 68 by September of 68 and by what Rich provided it appears it was available in "black" only. The HL covers though were still apparently (as per your P&A for the LH anyway) available in chrome as my info has the 68 LH HL cover not being substituted for the 67 part until November 68 and the 68 RH HL cover not being substitued for the 67 part until October 68 (even though your P&A shows it to be used effective 9/68...but that is perhaps to be expected given it was being "substituted" in). I was trying to nail down the exact date when the center chrome grille part was no longer available. At this point it looks like it must have been available through the 68 production run and then a decision to, as the old post states, go with one part for the two years. I wonder if there is some documentation (ESL or something) somewhere on the center grille "black" only decision?
Edit: Ed, I pulled another source I have and I think I have an answer (sort of
) for the Canadian vs US issue. The Canadian #'s were substituted in November of 68 with the US #'s. So, it would seem the Canadian publication was just behind. But that begs the question, did GM/Chevy originally plan on using the 3958003 and 3958004 part for 69 originally? Steve