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·TeamRush For President!! Tonight I just installed the TR ignition upgrade on my 258. Who needs Weber, Mopar MPI, Howell or Holley? I cannot believe how much of a difference that ignitin upgrade made. With the rest of the engine still stock, including the BBD and old ungapped plugs (they will be replaced tomorrow) that 4.2 happily motored along at 75 mph (even uphill). It NEVER could have done even 60 mph downhill with the wind since I put in the 4.46 gears. It would cough, spit, sputter and lose power. Not anymore. TeamRush, You DA Man!!