I'll just be driving and she'll randomly shut off. especially at stop lights. power cuts to stereo when turning right. I feel like it's one of 3 things. alternator, fuel pump, or a short somewhere.
I can't seem to figure out what it is. large plastic tube seemingly suppsed to have something attached but can't find any pictures of engine bays. I will post a pic later but any help would be nice.

 

Well, the turning to the right thing is weird. It would lead me to believe that you may just have something like a bad or loose battery cable or ground wire.

 

Just a thought, but there are grounding locations on the back of engine as well as on the front of the engine. My van is the same age as yours ... so anyways, I was surprised to find how corroded these grounding points were ... I have taken mine off and cleaned them really good just cuz I was in there anyway and at the time I had easy access. On mine, there was an old grounding strap ( rear of engine / passenger side ) that had been knocked-off at some time before I owned my rig ... so I replaced it. On Ebay there are guys who make custom automotive grounding straps ... so you can find one that way if needed ..... I think I would be checking these things as a good starting point .... it also might be a good time to super clean your battery cables and posts ..... let us know how it goes

 

My van does that as well - it will go a long time running fine, then it will randomly cut out. I've gotten the situation much improved by changing the spark plugs and wires, the distributor, and also sanding the grounding contacts and the part of the firewall where it is screwed in. I also put some dielectric grease on there for good measure. It's gotten much more reliable.

 

Grounds are import on these vans. I agree with the consensus.
A lot of power goes through the ground off of the front of the motor near the power steering pump up to the negative battery cable. I had to jump my van the other day and I could tell that there was a lot of current coming through that ground wire.
I also had the same issues but I had good clean grounds when I did. It turned out to be a O2 sensor. I had a Bosch in there and it performed horribly like many others had happen to them here.
I also have had bad battery terminals. They look tight but aren't. I have noticed that I have to replace the terminals every two years.

 

This is gonna sound kinda weird, but I swear the last time my van quit on me was just before I sprayed some carb cleaner into the vacuum port on the crankcase - the one the PCV valve on the right-hand valve cover attaches to. I had noticed when replacing my valve cover that it seemed gunked in there - some sludge from the valve springs must have been coming up through the PCV valve. I dug out what I could with a hook and a diamond file, and for the rest, I sprayed in a bit of carb cleaner and let it sit for a while, then I took it out for a spin and gave it some gas. Since doing that, it hasn't died on me randomly. I wouldn't really have thought the vacuum to the throttle body/crankcase would have caused stalls, but, just before that it died on me even after doing plugs / wires / distributor / ground wires, and afterwards it has yet to die on me. Full disclosure, a little bit after that I did a valve cleaning spray treatment into the throttle, so that might have helped as well.