It's a little harder to screw those up. Me, personally, I had an MSD cap & rotor & matching wires and had it zap the @#$*( out of me setting timing. I realized the plugs were cross-firing at the boots on the distributor side. I had used dielectric grease properly. The wires weren't sealed to the silicone very well allowing the stray sparks to find easier paths to ground. Up to you what you do with them, minimally if you've installed them I'd run the car in the dark and lightly spray the cap with water to see if you have the same problem I did, and then do what you think is right. Mine went to the county dump a few years ago.