Marcel,
I had a '94 and I think I used to lay on top of the engine and ran my right hand in between the brake lines and under the intake horn. You can get a filter wrench on it that way plus spin it off and keep ahold of it. This is a spot towards the front of the engine where you can grab the filter to bring it out with your left hand while holding it from underneath and moving it forward with your right hand. You will lose some skin on your right forearm the first time, can't be helped. Maybe throw on a long sleeved shirt before you start.
You need to drain it and unplug the sensor before you put the wrench to it. Also after you drain it you may want to pop the drain hose as well, I can't remember if I brought mine out with the hose on or off. It's been too long.
When you get it changed and your arm is done bleeding

you will have to prime the system. On top of the filter head are the inlet and outlet connections. Look at the forward fitting, there should be a small plug in the center of it, 10mm wrench I think. Loosen that a bit and then pump the primer until you see fuel come out of that fitting, stop pumping and tighten it back up. That indicates the filter is full and makes the truck start much easier.
It may take many pumps, don't give up.
Go find a broom handle or something to pump the button with, then you are standing on the ground rather than trying to reach in over the fender.
If you run into trouble let us know.
Others will have more tips to add, I'm sure. It has been long enough that I may have left something out... .
Mike.
