First of all, welcome to the best darn petro site in the world!!!! To answer a few of your questions, black would probably be appropriate, unless the company that you choose, used something else. As far as the internals, remove them. Two more things to check out.....
http://www.oldgas.com/shoptalk/ubb/Forum4/HTML/001409.html Then get "The Guide to Gas Pump restoration" available here, in the bookstore.
http://www.oldgas.com/pp_books.htm After that, keep us posted. Lots of pics please. BTW.... Welcome to the madness.....