1970 Jimmy grill fitment

[FireBros.]

I recently purchased a 1970 jimmy. The PO swapped a chevy eggcrate grill onto it and shaved the GMC letters on the hood. I guess he wanted a chevy. While I have always liked the eggcrate grill, it bugs me that my GMC has a chevy front on it. I did a little research and it seemed that the only difference between GMC grills was the black paint and the presence of the top trim or not. I bought a grill off a 67 pu and am having issues getting it to fit. All the holes line up correctly, however the width of the grill seems to be about 1/4" wider than the space between the fenders. Any education on this would be helpful. I looked at every thread mentioning grill swaps and never found the info I was looking for. I know 67's had a different hood, but that is not where the issue seems to be.
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