Rally Wheel Questions-Noob

I am trying to upgrade my 65 barracuda's SBP 13 inch rims (LH/RH lugs) to some SBP 14 inch rallys.There is a set for sale locally without trim rings or center caps. I have some questions.

Are all rally rims at least 5.5 wide?

How hard is it to find center caps and trim rings and more importantly, how expensive?

Will I need to buy new lug nuts too, and are they readily available or expensive?

Can I put the rims on for now without the center caps and use my old lug nuts?

Has anyone ever painted rallys black or body color?

Thanks!
Author: admin