You can get an adaptor to run the factory CB from Radio Shack and use a regular CB antenna while still retaining the rest of the OE stuff.
This is what the factory antenna looks like:
I also was fortunate enough to find an NOS mic:
I also have the complete install instructions direct from Ford. For $15.00 I would mail you off a copy. You can paypal me at Ranger429@mchsi.com
if your interested.
I've collected quite a bit of CB stuff for this era.