Diesel swap wiring help needed

[Crocky125]

Putting a 6.5 in my 86 k10. Had a 350 in it previously and am wondering what I can eliminate, keep and what I need to figure out if I haven't got it yet. Didn't have an engine in it when I got it so that's why I'm trying to figure out the wires.

Oil pressure wire-brown
Coolant temp wire-green
Coil wire-pink
Tan/blk or what/black wire?
Blue-black-white 2 prong plug, 3 wires in total?
S-wire-purple

I think that is it for plugs on the engine
Any with a question mark I need to know what it is for and if I need to use them.

How do I hook up my alternator? I'm using the 6.5 alternator. So the exciter terminal is L on the pigtail. Which wire on the truck harness is the exciter wire? Black or red? And then the other one left over is for the gauge? And I could just hook that up to the charging post?

Anything I'm missing?
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