[Danr55]

Bill, think about it. There are only three things that will keep an engine from running. Fuel spark and Air. If the car ran fine before you change the plugs you've obviously taking something loose somewhere. Go back and check all the connections at the coil and make sure that everything is hooked up correctly then try to start it. If it cranks you can still check the spark plugs to see if the electrodes are compressed.