Dually Wheels--Teach me!

[roll_the_dice]

OK, so I am starting to think about my next project...1964 GMC 1 ton Dually. Since I need new tires, I want to update the wheels at the same time with chrome or polished aluminum. I have read these trucks were hub centric and the hub bore was 4.56" with 8x6.5" lug pattern. I have also read GM trucks older than 2000 were the same hub size. Is that true?

I found an inner rear steel wheel with the correct hub bore and bolt pattern. On the outer wheel, do they still need to be hub centric? I found an outer wheel that is 4.60"...would this work? I am assuming the front wheel just needs to be the right bolt pattern or do I need to worry about the correct hub size also?

I think I have decided on 16" or would it look better with 19.5"? Subjective I know.

My plans on the truck are to put a flatbed on it (unless I find a stepside bed I can alter).

What am I missing or haven't thought about? Dually's are new to me...here she is before I do anything to it...blank canvas. And I am doing the build as cheaply as possible..I will sell this eventually for the next next project...a 50's truck.