Hi J.,
I had my phase 1 BJ8 repainted last year. In order to save a few $'s, I took off all the bright work including the grill, and the 2 piece surround. Two months later, when I received the car back from the painter, I was sure the grill surround wasn't going to fit. I couldn't remember exactly how I removed it, and the last thing I wanted to do was scratch the new paint. Well, ultimately, it did fit just fine. Note that the same grill surround fits the Bn7/BT7 from 13751, and the BJ7 and BJ8. Earlier models had the earlier grill. I think I would find someone with a BJ8 and measure/compare their grill opening with yours. If it is the same, perhaps the fitment of the grill surround will become apparent.