Wow. That is quick service.
Never seen a key way in a pivot pin before. Custom.
With that new arm, you'll have to extend the steering cable to reach, right? I wasn't sure if you took a look at that or not.
What are you looking to do with the interior? All new wood and upholstery? Just new upholstery? Buckets and a bench? Cocktail style?
Have you thought about fiberglass shells?
About 10 years ago, I had a completely new interior (wood, upholstery, and carpet) done for $2,000. That was down here in SoCal.