As for aftermarket grills for the 78' I have an OPG grill and not impressed with fitment compared to the original. Still looks great but basically there are larger gaps in the bottom corners of the grill between the other pieces of chrome on the car. I wouldn't buy one again but that's just my experience with them. Just didn't impress me compared to the original. However that all being said it's still on my car because it looks much better than my original did as far as the finish is concerned.