Would you substitute the black satin mirrors and outer door handles if I purchase this kit?

• Does this kit come with step by step instructions? Also if black is chosen instead of chrome will it be a lesser price s install
• I bought a project pile of '66 parts 2 yrs ago. I believe the doors are original '66 as the window frames bolt on. I've fitment
• Do you sell individual parts or do I need to purchase the whole kit? general