I own a 73, a 79 (technically two 79's to make one), & a 90. I love them all. I'm a member on FSB as well as here. I have some good friends there. FSB has calmed down over the years & the crowd is different than it once was.
This forum has a special air to it. Everyone seems to not require a lot of moderation to keep between the lines. Pushing to bring others in will likely change the overall feel of the place, & add to Jon's work load.
Since they have a 78/79 tech section at FSB, it doesn't seem like there's a real need to add one to CB for those who aren't already here.
But for those who are here, this community is very knowledgeable, understands more than just EBs, & many members have good info to share with those of us who have newer Broncos.
I think a good plan might be to keep the forum as is. For members who want to discuss those other years, encourage them to include year info in their thread title, so the thread title itself draws in those within this community who can help.