If you’re concerned with the mess on the VC, have a look at a vac diagram. IIRC, what’s up there is one vac line straight from the manifold, one line from the connections on the IP, and one going to the EGR. Those could all be removed.

The rest of your system should follow the diagrams available here and elsewhere. Body consumers include the two yellow lines for locks, green for hvac, brown for shutoff and one more. Engine and trans consumers go to one of two spots on the IP, and a black tube that goes to the AT.

Start getting rid of golf tees and move to basic splitters/junctions...

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)