Amazing build. The only fault I saw was a seam on the air scoop which you have since corrected. Who was the manufacturer? Where did you get the rivets? How did you place them so accurately?
The sad truth is the market seems gaga over 3D printed stuff. For some things its quite good. For bodies, the traditional resin is still the best choice in my eyes.
Best Tom West story I know was he told me he threw away a large box of 1/16 Aurora test shots because he was moving and didn't think anyone would want them. While I never met him, we had several internet conversations.
I'm impressed with this build. Until I read your cons my opinion of Hasegawa kits was raised. With those issues to get to this result is impressive. You did great with your fight with the decals.
Scroll down to Hayden Profitt's convertible:
https://www.dragracecentral.com/DRCStory.asp?ID=359256
or Randy Wall's car. Both are later bodies but in that era did that matter?
https://www.jalopyjournal.com/forum/threads/60s-funny-cars-corvairs.312405/
I'm opposed to opening it. It is only orignaly factory sealed once. If you want to build it offer it up for trade for an opened one. I'm sure there are collectors, another side of the hobby, who'd love to have a sealed one.