What do I need for a proper under-dash rewire?

One thing those three items have in common is their power goes through the ignition switch and the fuse the box.
Power for fused circuits that are on only when the key switch is in run or acc comes from the wire marked Accessory. It goes to the fuse box even though I didn't label it.
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The big black dot represents the main junction.

More crimping illustrations here:
International Full Size Jeep Association - View Single Post - Cold Temp/humidity sensitive Ignition
The crimpers from American Wire are nice, but a bit pricey.
The ones Halifaxhops posted look good.
I'm using a set from Astro Tool with interchangable jaws. Downside is the open barrel jaws are little too wide for some of the male terminals. Otherswise I like them.
Some more rewiring guidance in this one
WIRING NIGHTMARE

Twin lock and pin type connectors shown in the back pages of this pamphlet
Electrical Wiring (Session 247) from Chrysler Master Tech