Jack,
If the truck uses a GM DIS ignition (usually 96+), the ignition upgrade isn't worth it as factory GM coils can get the job done. If it's a distributer based ignition system, just a coil with a good cap and rotor should suffice.
1985+ 300ZX Turbo, 85+ Thunderbird,Mustang SVO+, DSM cars would all be good sources. If you are looking aftermarket, Super 60 T3 would fit you fine.
I wouldn't go the route of FMU, but look at things like Megasquirt. Adding fuel by raising pressure works, but to make it worth your while you'll want something for engine management.
The enemy you face is charge temperature. The air that will be going into the truck gets incredibly hot after being compressed, send that into an already hot combustion chamber designed for only normal atmosphereic pressures...engine go boom. So to expand on invaders statement, the intercooler will make the engine last longer. The lof law of power with forced induction is colder, denser air makes more of it - safely. Don't forget you'll need to use atleast 93 octane to keep the truck running without knock or detonation.
You may also want to go down a heat range and tuck in the gap a bit on your spark plugs. Copper plugs should be used and depending on your situation, .005-.010 of gap reduction is normal.
What is your budget looking like?