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Ignition Timing

Set timing at idle speed with distributor vacuum line disconnected and plugged.

283" Except Synchro-mesh with A.I.R. 4° BTDC
  Synchro-mesh with A.I.R. (1) TDC
302" (3) 6° BTDC
327" 210 HP 2° BTDC
  275 HP Except A.I.R. 8° BTDC
    With A.I.R. 6° BTDC
  300 HP Except Auto. Trans. with A.I.R. (2) 4° ATDC
  325, 350 HP 10° BTDC
350", 396" Exc. 375 HP 4° BTDC
396" 375 HP 6° BTDC
427" 385, 390, 400 HP 4° BTDC
  425 HP 10° BTDC
  435 HP 5° BTDC
(1) Set at TDC.
(2) Set at 4° ATDC
(3) At 750 RPM.