Chevrolet: Tune up on a 95 Caprice LT1, chevy caprice, type plugs

Question
They kept the car until they got it running. They took what they did apart and put it back together again and said it started right up. With all the sensors they put on these cars I was beginning to wonder if changing all that stuff caused one of them to shut down the car.
Actually the car didn't have those type plugs before but it is running fine with them. I was just wanting a little better plug.
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Followup To
Question -
Hello
I just had a tune up done on my 95 Chevy Caprice with a 5.7L 350 LT1 engine and now it won't start. I had the distributer and rotor, plugs and wires all replaced. About a week or 2 ago the fuel filter and fuel pump was replaced. The car was running before the tune up as I drove it to the shop that did the tune up. There is spark from the plugs (I had Bosco Platinum 2 (don't gap) plugs installed). Is there a problem with using these plugs or is there something else causing it not to start?
Answer -
HI DALE;
 I was wondering,if the car ran with those plugs than I doubt it is the plugs,but I would stick with orig. equ. or H.P. equp. I bet it is in the distributer or the wires, as it was fine prior right, so take it back to the guys that did the work let them fix what they did to it.
Roger

Answer
Dale;
    Good for You as they did the work so let them fix the car, also if they did replace a few sensors and did not re set the comp. it would for shure not let the car start.So it is fine now-thats good.
and if those plugs work well than stick with them.Glad to hear it is up and running.
Roger