Moving forward. Installing the passenger side, there was a pretty big gap between the frame and hoop.
The front side was sitting good to the frame so I made a double tapered filler like so.
Now the hoop sits really well.
On to cleaning the threads. These parts were dipped so many times that threads were horribly rusted. I first ran a wire brush to clean the loose rust.
I then ran a tap through the threads. I'm really glad I didn't skip this step. These threads were really really bad. The UCA threads felt like I was tapping new threads. I had to put them in a vice to even clean them.
A final cleaning with a new brush wrapped in cloth was done.