It could be something as simple as plug wires, cap, rotor, or worn plugs.
When I was spraying I would put a new set of plugs in every trip to the track.
You can check your wires with a digital volt meter set to ohms. I don't remember the "good wire" number though.
I want to say 1000 ohms per foot? I had a set of the blue Motorsport wires that were only three months old and had way too much resistance. I replaced them with a set of MSD wires.
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1988 Mustang GT
stock bottom 302, C4
10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN
1989 Mustang notchback
Warmed up 306 with a Procharger.
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