Frank bought it a month ago, and it's finally back for one more front fuel pump.
For more info, read these captions:
At the same time, I'm adding a 4-pin trailer connector & swapping to this chrome bumper.
I also found the main vibration: the rear U-joint was installed incorrectly, and it was holding the d'shaft offcenter. I reinstalled it & it's smooth sailing now.
While it was here, I also rewired the low fuel light module so it doesn't interfere with the gauge when switching the tanks.
For more info, read these captions:
UPDATE: Frank & his sons enjoyed the truck for many years, and then gave it back to me in 2019.