We put in new spark plug wires and distributor in my 92 gmc safari van. The van will not start so we want to verify that we put them in their proper order.

Here is the diagram

This just happened to my Dad's 1998 GMC Safari...

Firstly...

Check the hard vacuum line as previously noted by others.
If that's ok, then take off the intake pipe and spray brake clean into the throttle body while trying to crank it.

If it starts.. then you have a fuel related issue, if it doesn't start then you have an electrical related issue.

Our van did not start after trying to use brake clean.

Take off the console inside the vehicle's cab and get at the distributor.

Usually people noted that the ICM (ignition control module, inside the distributor) was the main issue here, but on our van, the distributor and wires looked brand new so it was probably recently changed (we got this van 5 months ago), so I assumed the spark plugs were also changed at the same time.

We unplugged the connection from the coil to the distributor, tried to crank it, and no spark was being generated, boom, got a new coil and starts up fine.

Just takes a bit of trial and error.

limited backfeed but id try a vacume leak

It is the Ignition. If you put starting fluid in it, and it did not start, then you probably have no spark.

Check that you have spark to the spark plugs. If not, then check the vehicles' Ignition System, and repair as neccessary.

ignition coil most likely as you have changed all the other/recommend replace ignition coil

Check the rotor under the distributor cap. I have seen these things actually melt the connection internally and you will not get a spark. Also it is a very cheap and worthwhile investment even if it isn't what your problem is.

The distributor cap, spark plugs and wires are inside the van and you need to remove the glove compartment first then the heating duct then the hood. All this is located inside the van when these things are done you will see the distributor cap.

Since you replaced the distributor, are you sure it's properly timed? Hook up timing light and try to crank. It should show you where your timing mark is. It will also verify that you are getting spark.
You need to start a systematic check. Is it electrical, mechanical, fuel related? Need to do more checking and maybe we can get that puppy going.

Good Luck

have you ever had a tune up on this van such as plugs, wires, cap ,rotor

Check your spark plugs. That could be one of the reasons. Or are you sure you purchased the proper Fuel pump?