I realize this is quite a late reply, but I try to help out with part numbers in case anyone is ever looking for them. I was looking through the forums threads here trying to figure out what size the factory tailpipes are for the 85 GT's, and I stumbled across this post.

In this case, for the 1980-1984 5.0 engines, the PCV grommet part number is E6TZ 6A892-C. For the 1985 5.0 engine the part number is E5TZ 6A892-B (replaced by E7AZ 6A892-A).

For the elbow connector grommet, the part number is the same for the H/O engines, E2ZZ 6A892-A.

Hope this helps someone in the future.