CK5
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Help what is what - Wiring

Question. Should the engine harness run underneath or over the brake booster? Also what should this wire connect to? The fuse block?
 
Here is the wire. Runs next to the red hot to the fuse block on fire wall.

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That is the fusible link that feed the the main fuse block. It should be connected to the junction block on the firewall.
 
Ok so I think both these go to the fuse block on the firewall.

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The harness taped to the vacuum hose goes to the cruise control module. The round thing on a firewall bracket is the "tip in" vacuum switch, which is part of the ESC. That weather-pack you have circled below it should plug into the ignition module wiring (that spark box is under the dash, in front of the glovebox. Chances are that the distributor has been swapped or the module swapped to get by without ESC, but this is also some harness mod that bypasses it.

Do you have the emissions label on the core support? It can shed some light.

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Harness run over or under the brake booster?
 
What’s the fix for this. Factory alternator wire is 2 prong. My alternator is 4.
 
Further the spaghetti trail of wires had a main wire from the positive side of the battery to the starter and the alternator. Is that right?
 
ACDelco Professional PT2145 Alternator Conversion Jumper Harness https://a.co/d/crpn90k

Edit make sure that fits. That's is the one I used on my custom built by, @500$k5
 
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Are the connector terminals labeled PLFS or PLIS?
 
PED but I need an adapter to convert from 4 prong at the alternator to factory 2 prong plug.

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I believe @Blue85 wanted the markings from the alternator plug. It appears to be CS130 alternator

edit: PED is generic mfr mold markings
 
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