I'm going to do my best to help, but I may very well be wrong, and I'm sure I'll be corrected if so. #1 may be the lead to your AIR pump. Not sure which side of the engine it should have been on, but if you don't have one, this may be what it is for. #2 may either be one of the lines for the AIR pump as well, or a vent/vacuum line. Where does the metal pipe go that it connects to? This may help in narrowing it down. #3 looks like the lines that would connect to the MAP sensor, or perhaps an anti-diesel solenoid? #4 & 5 ... not sure. #6 looks like the lead to the A/C compressor, or perhaps if #5 is a port for a missing sensor of some sort, maybe it goes to that. #6, again not sure. Where do the two pieces go? What each end is attached to will definitely help figure it out. All of this will also be much easier to figure out with a Chassis Service Manual. I will send you a private message to help in getting one. Another thing would be to ask the group here for some pics of someone's engine who has the same year and accessories to compare to.
Jim