Time for new tires and rims for the 68 Dart

They're gloss black right now, with some paint peel. So gloss instead of satin?
The tires have to be pulled anyway because they're worn and very old. I'm planning on driving down to Spring Fling in April and I'm not making the trip without new rubber.
Truly up to you! If you have gloss black now, and want a change, shoot some cheap satin black, see if you like it. If it's what you want, then powder coat If you want.
I love to swap wheels and tires around, changes the personality, along with exhaust changes.
And new rubber is always a good idea.