Thread: Timing on 620" BBC
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Old 05-02-2008, 06:14 PM
  #4  
bjuice
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i have a 632 with 14 degree big chief heads on gas...it likes 34.

as they say start off conservative and work up...i will go out on a limb and say 32 would be a ( extra) safe place to start and go from there if it were mine and no dyno records to show sweet spot with timing

Brian
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