I normally don't post, but have a real issue with trying to determine whether BBK headers will work on my 1990, with a 351w. BBK Tech Support says that they have a specific note that they will not fit on a Bronco. Still, I see lots of members running them. Can someone please give me a heads up on this, as I would like the BBK's, but don't want to buy them and they not work. BBK support could not tell me why they would not work. Maybe they will only work for 92 and newer and not for 87-91.