Been trying to decode all my RPO codes for my 1987 GTA and have been successful with the exception of 1HV. I did a search and came up with

"1HV= components of the IROC-Z package"
from another thread on this board when they asked about the same RPO for a 1987 Iroc-z

So my question is is that for all f-bodies alike or is there another definition for 1HV, since I do not have a iroc-z?

Thanks in advance for any informatoin.