Help me with my build

[fast&low]

Hello fellas
I'm a new member and new truck owner new member as I was just now today given the ok to post & new truck owner as I have only owned my truck for a week & a half.
It's a 69 Chevy C10 SWB fleetside pretty much stock other than shaved bumpers & corvette yellow paint.
Ok here we go, I already orderd a front disc swap kit & a 4/6 drop kit. So my next step is I love the big,wide & deep back wheel look on these trucks & I'm thinking either 20s/22s or 22s/24s with fronts 8/8.5 wide & rears 11-12 wide wheel setup depending on your recommendation?
Up front by what all of you are running I'm guessing 5/5.5 backspacing but the rear I have no clue??
I know I need to narrow the diff & mini tub & I will to get this look.
And guys before you judge me, let me tell you not only have I never done this before. But I also live in apartments that won't even let me change the oil in my car, so yes I will be paying someone to do this :/
So what I would love & appreciate is if anybody that reads this & has done this to there truck. If you can tell me your build sheet & show me your pictures that would be greatly appreciated.
How much did you narrow the diff?
How wide of a wheel & what backspacing did you go with?(looking for at least a 6inch lip)
What size tires?
But if you didn't have to narrow & tub for a deep lip that's even better!!!
How wide of a wheel & what backspacing for a deep lip?
If there is anything I left out plz tell me.
And plz guys I have looked up & read other posts on this subject but they are old postings & not all my questions were answered so plz don't judge or disrespect me in any way im just a newbie at classic trucks but I like doing things right the first time so if I can follow your recipe it will look good & be lighter on the pockets.
Thank you for looking & for your time
1969 Chevy C10 SWB fleetside
Chevy 350/700R4
Will very soon have front power disc brakes & 4/6 drop