Re: 1986 gibson sg w/ paf`s
If the guitar was produced in 1986, and it is in all original condition, it seems curious that the pickups have a PAF sticker under them.
This might seem obvious, but PAF stands for Patent Applied For, and refers to the early years of humbucker making, when gibson had applied for a patent, which took some years to get. With that said, I was under the impression that PAFs were a thing of the 50-60s, certainly not going into the 80s, since the humbucker patent era was far gone.
Anyways, seems strange since you are claiming it to be all original. Pictures would help, and more knowledgeable forumites will surely chime in.