Timing Specs

• The 350 SBC had a piston firing order that went from piston 1-8-4-3-6-5-7-2. The spark plug gap measured 0.60 thousandths of an inch and the ignition timing was before top dead center (BTDC).
  
  

Piston Ring and Connecting Rod Specifications

• The piston rings have a displacement of 350 cubic inches and a bore of 4 inches. One piston ring has a compression ratio of 3.9 to 0.726 cubic inches, and another has a ratio of 4.64 to 0.622 inches. The connecting rod has a length of 5.7 inches and a stroke of 3.48 inches.
  
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Crankshaft Torque Specifications

• The 0.3434-inch bolt on the rod connecting the pistons to the crankshaft had 35 foot-pounds of torque, the 0.375 inch bolt had 45 lb.-feet of torque, and the 0.4375 inch bolt had 75 lb.-feet of torque. The inner bolts connecting the crankshaft to the engine block had 25 lb.-feet of torque in step one, 50 lb.-feet of torque in step two, and 75 lb.-feet of torque in step three. The outer bolts had 65 lb.-feet of torque. The bolts connecting the flywheel to the crankshaft had 60 lb.-feet of torque and the bolts connecting the pulley to the crankshaft had 30 lb.-feet of torque. The bolts connecting the vibration damper hub to the crankshaft had 60 lb.-feet of torque.
  
  

Spark Plug and Timing Torque Specifications

• The 0.8125 inch spark plug had 22 lb.-feet of torque, while the 0.625-inch spark plug had 15 lb.-feet of torque. The bolts connecting the timing chain belt cover to the engine block had 6.25 lb.-feet of torque and the bolts connecting the timing chain belt sprocket had 20 lb.-feet of torque.