Plug-and-Play Wiring Harness

Even though I've done a lot of wiring kits I don't consider myself like a highly skilled wiring person...
To me it just was a lot of common sense. Now the wire that says headlights on it goes to the headlight switch and provides it with power from the fuse box. Then the wire going out to it goes down to the high low beam switch which splits out into the high beam side of both headlights and low beam side of both headlights... Kind of so forth and so on... To me it's almost easier to do a generic kit because I start with all the generic wires and put them to where they go.
Thanks to all for the information. My main concern(s) are missing wires and/or wires being too short.

I can read/trace electrical schematics pretty good. I'm an EE by trade for about 20+ years, although in the electrical power utility arena. I don't pretend to know everything but not afraid to dive in to new projects.
I hear ya on not expecting to do a wiring job in a weekend and everything being actual plug n play.

Been around and worked on vehicles long enough to know that I usually multiply how long I think it should take by 3 or 4!

I suspect it may take me around 2 months or 8 weekends more or less. Not going to get in a hurry. If it takes longer than that, so be it. If less, great.

I want to make everything as clean/neat of an install as possible. Have a lot of time, sweat, some blood from a slipping wrench or two and money in this project so want to do it all as right as I can.

thanks again everyone. Appreciate the information. I'll also look at the other manufacturer options mentioned.
In your case it's time and patience and knowledge which more so like I was pointing at is kind of common Sense wiring I would highly recommend a very inexpensive 20 circuit generic wiring kit, some solder filled shrink wrap butt connectors, some different sizes of wire loom and an assortment of smaller zip ties... I did the wiring in my power wagon resto like this and it turned out extremely neat and tidy.... I took the time to route all the wires in a hidden fashion and pull them back out cover them in the loom and put them all back in neatly..