Offset and back spacing wheel ?

[Aboud]

I'm sure this has been asked a 1000 times but I got to ask again.

I am currently building my first 84' c10. It has a 5/5 drop and I am wanting to run 20" fronts and 22" rear. My question is what would you recommend as far as offsets and back spacing. I plan on using 8.5" width on front and either 9.5 or 10" width on rear. I like the look of a large lip in rear in slightly less in front. Thanks in advance and feel free to post pics and details of your rides. Would love to see some combos to get ideas.