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spark plugs

  1. Chevelle Tech
    I'm trying to get in contact with the previous owner but his cousin won't reply to my messages, his cousin sold the car for him. the engine is either a 396 or 454, seller said 454 but ive had a couble people tell me it was a 396 so ive been sticking with that.
  2. Troubleshooting
    Have rebuilt-to-stock-spec 396 L78 and recently experiencing bogging or hesitation (what seems like engine misfire) when accelerating in the 3k to 4k range. Starts, runs, idles well cold. No dieseling or pre ignition noted. Hesitation begins when engine reaches 190 degrees. Driving a short...
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