Wheel Tire Help

[nknspqs]

I am working on finishing a 1970 SWB C-10 and am looking for info on wheel and tire size. The truck was set up suspension wise to be a driver with stage 2 porterbuilt airbag kits on front and rear. No body drop and no mods to bed or front fender wells. However it's gotten out of hand and now so clean it likely won't see as much road time as originally thought. All that being said, we are looking at doing a 285/40-20 on the rear on a 20x10 wheel and a 245/40-20 on the front on a 20x8 wheel. We have yet to determine backspace but are thinking we'll be close to 5.5" on rear and between 4" and 5" on the front.

What I am looking for here is some examples close to this configuration to get advice from you guys on pros and cons of this set-up or suggestions. Pics would be great for visual reference of ride stance with this size wheel/tire if you have them. I'll take any info/advice on "common" tire/wheel size or backspace info you are willing to offer.

Thanks in advance for any and all help. More details on this build to come, quite and interesting story.