Still sorting through 66-67 Oldsmobilie parts collection and gathered all Trico wiper arms.

​​​​​​Asking CO group, in my first pic of the 20 similar lengths arms, do those fit 64-67 and same length for both sides?

I ask for there 6 arms that are either shorter, same length, or longer, but have a different cover for the spring.

What factory finish should they have?
Matte or polished?
The NOS arms seem to be matte.

Thanks

Mader
jm68442@yahoo.com