Well here is what you'll run into.
I snapped a couple quick pictures this morning before work.
I'd never really split a fuse box apart before so I was curious too. There is a lot of wires there but the bottom of the fuse panel itself isn't as scary as I thought. In reality, there are like 4 main (larger) power supply wires. These wires are a common feed of electricity to multiple fuses. What I mean is let's say one of the larger feed wires is red. That red wire may actually feed 4 separate fuses.
So it's not like each and every fuse has a separate wire in and wire out.
Each separate fuse has a dedicated wire out, but may share a common feed. Does that make sense?
Some of the connections below are push on connectors but the majority of them are soldered or some kind of crimp connection.
I had an older vehicle once that the crimp connection at the fuse holder itself became loose and would intermittently lose its connection. I didn't want to tear apart the fuse box so I found what wire was giving me trouble, snipped it, bypassed the fuse box and installed the correct size of inline fuse holder and fuse.
Anyway, here are a few pics of the fuse box....
Face of a 1978 Chevy truck fuse box
Side view
View of the fuse box split apart. You can see the larger feed wires powering multiple fuses
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