[midniteblues]

The black wire usually goes to a smaller stud on the back of the alt. Sometimes it may have a screw holding it too thr back of the at. It does Not screw on with the red wire.

Like lock doc said remove that oil sending unit and screw your line into it.
You can see the oil line fitting too the lower left of your hand in the one pic. Be careful not too kink that line since it was a 6cly truck it will be longer than nessacary .

Not sure on that vac line it looks to be a power brake vac line but on the wrong side of the engine.
Your truck should only need two vac lines. transmission vac line should be plugged in between the carb and distributer

And the line for vac advance. distributer can too carb.
Oh if ya wanna count the pcv.carb to valve cover.