yours does look like it should though - the two small holes in the center are for mounting the emblem - JM2C - I think 71 did, though they are very often missing. Oh, nice work - it looks good!
70 was the only year the emblem was factory, 71 and 72 didn't have them and of course the 72 grill also didn't have the extra moldings in the middle like 70 & 71