Ok so picking up where i left off on the CB.
I really wanted to put the antenna in the back corner behind the taillight, but then remember the way i built the bumper, that corner is double wall + laminated, and it would never work! So i came up with a different idea:
FM radio sucks! Who needs it anyway, amirite???
Sawed the back off the feedthrough
The antenna stud fits! That was easy!
I had to very carefully open up the hole in the chrome cap ever so slightly, so the lock washer would fit thru it
I thought that was gonna suck do do, but turned out to be a pretty easy project. I should be getting my new antenna cable in the mail today, so next week ill hook it up and try tuning the CB, see how it works.