The front looks lower than it should. Either that, or the rear is higher... In any case, if you want it lowered and "level" without having any issues with tire fitment (might have to go one size down on sidewall from a 275/60R20 to 275/55 or any equivalent ~32" overall height tire/wheel combo) then I'd suggest a 2/4 drop.
2/4 drop is a nice change from stock and requires zero fuckery. No C notch, not fitment issues, no camber issues, no clearence issues, makes the truck mostly if not entirely level, looks great, and with proper lowering shocks, or extenders, or whatever, it'll ride great, too.
Only thing you have to do is get the new spring perches welded to the axle at the same angle and side to side location as the stock ones before you do the axle flip. Some have said just having them firmly tacked on is good enough, so all of that is up to you.
I recommend drop spindles in front over drop springs. For reasons of alignment and not having to get aftermarket shocks. The rears should only need extenders, but aftermarket shocks might help if you don't want to do that. In any case, just doing the rear will be wonky and wrong. If you have excess rake (rear higher than front) compared to stock (2.5"-3" or so) then it's probably a worn out suspension issue on the front and fresh stuff will fix it a bit.
If you just wanna bring the rear down a smidge so it doesn't look so downward doggy, then get some drop shackles and live with the slight rake and not so lowness it'll have.
At the end of the day, any given result will be based on time, money, knowledge, and ability. The forum can give you knowledge, the rest is up to you. If you can fab your own stuff and weld by yourself, then it's mostly gonna be time and knowing what to do. If you can't then it's either money and time to earn and pay for it to be done and wait for it to be finished, or time+time+time to learn how to do it, earn money for parts/tools/materials, and then actually do it and have the truck down while you do.
Sorry for the wall of text, I tend to overshare and act like a know it all.