Hard Starts! changed out wires,plugs,dist.cap. runs on 3 cylinders during idle until warm then runs fine

Check to see if all your fuel injectors are firing. To check, take a screw driver and press it agains the injector, then press your ear against the handle of the screw driver and listen for clicking. If no clicking, then either your injector is bad or you have a bad injector resistor pack. I'm not sure how to test the resistor pack (standing in front of the car, it's on the right side of the engine compartment with the heatsink attached), but you can check your injector by measuring the resistance on the contacts of the injector. You should get 1.5 - 2.5 ohms. If not in that range, that could be your problem. Next I'd think about replacing the ignitor inside the distributer and/or checking the fuel pressure to make sure it's good.