Plug-and-Play Wiring Harness

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.