Probably depends on which Pertronix. The original Ignitor still uses a ballast, so probably keep near 35 mil gap. Ignitor I & II is more like HEI (no ballast), so can probably run 50 mil and an e-core coil, but would need better plug wires (say 8 mm silicone). I expect the rotor and cap would still survive, unless they are a much poorer design than the Magnum engines used (ca 1990 to 2002). Anyone installing a turbo will likely need to reduce the gap since harder to throw a spark at higher cylinder pressure. There was a Chrysler TSB about this on the 2.4L turbo engines and I even had to do so on my 2.4L non-turbo to fix a spark miss at low speed, high throttle.