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  1. BO94ZA4

    98 gt auto -- 3.73s or 4.10s ??

    Go 4.10s. U have an overdrive.
  2. BO94ZA4

    Timing degrees adjustments

    proper way to adjust base timing for max performance= go get a vacuum guage and set the timing idling untill max idling vacuum is achived then lock it down. Every engine and region of location (north and south) will be different and thats why thats the best way to do it.