Depends on what you mean by rewire?
Whenever I get a new truck (used but new to me) I always "fix" all the wiring. I just follow all the wires and repair them or replace them. POs always have a way of cutting and splicing the wrong wires...
I just buy a couple mini spools of different color wire (red, green, and black), big bag of wire ties, some flex loom, and some heat shrink tubing (this stuff is real cheap). I solder up all connections and shrink the tubes on them.
If I need new connectors, I just go shopping at the junk yard and solder on better ones.
I could redo a 83 truck for $25 or less and have plenty supplies left over for another truck.
It is just time consuming. Most of the time, its pretty easy to get your wiring in top shape. It just looks like a mess at first but most of the wiring is in great shape
I also reroute all factory wiring that is poorly designed. Like looms going under column when they are better served over the column or wires in front of the fuse box that make it hard to see the panel... I reroute everything so it is very clean looking under the dash. No spaghetti at all. best way is to rip apart the entire dash so you can check every wire and follow them. Real hard to do with the dash, vent system, or anything in the truck.
If you are talking about replacing every wire, I think you are wasting your time. But if that is your plan, Just buy a bunch of wire and I hope you like to solder alot
