The problem I think is that we just don't have enough info. If you could tell us everything you've tried 'til now we can probably get this thing started. Check this out for instance...
In the past 4 months I've replaced...
Distributor
Control Module
Plugs
Starter solonoid
Various wires (mostly on the solonoid)
Added a Fuel Pressure Guage (Thank God I didn't leave it to guessing... I was at 75 for a day or two)
and still I have problems. So I'm almost sure its either- a wire (computer), fuel pump, fuel filter and I wait til spring.
Like said before, if it cranks you have spark. Is the spark intermitant (Check with a screwdriver against a grounded surface or as mentioned before)? Does it always crank with starting fluid for a couple of seconds? Have you primed it? Have you checked the fuel filter? Does the fuel pump stay on or die out? Is the distributor loose? This could be a lot of things from what I've been through.
Give us all the 411 you can and we'll get that bad boy running!
Oh yeah, did you possibly change tail lamps and hit the cut off switch? All kinds of stuff to check from my experience on this one... it is a dinosaur you know!