If there were sleeves over the threaded portion of the plug they were pre-gapped.
The site, if I remember said .044.
Regardless, these plugs don't wear like the copper ones you removed and as such the gap will have barely changed at 80k.
I'm sure the plugs you removed were probably worn well beyond .060 and as you said, other tham MPG, it ran well.
These coils have no problem firing a plug out to around .080.
IMO....Leave em alone, it'll be fine.
Street engines really aren't that critical.
Now, if we were talking about a dragster my response would be different.