GMC TRUCK IGNITION

I Just Did A Tune Up On My Truck And Now Theres No Spark Going To My Plugs Or Wires, What Could I Have Done Wrong?

I Have A 98 Gmc 1500 Series Pick-up And Have Replaced All Fuel Injectors, Coil Pack, Spark Plugs, Wires, Distributor, Ignition Control...

I Have An 84 Gmc Sierra Classic 1500 350 V8 Holly 600 4 Barrel Carburetor. When It's Idiling It Runs Fine When Shifted Into Gear It...