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Part #60959, 60969, 60979, 60989
Rev. 1/09 - AJ/mc Page 4 of 4
©2009 Edelbrock Corporation
Brochure #63-0155
Head Bolt Torque: 65 ft-lbs (in steps of 40, 55, 65)
Intake Bolt Torque: 11 ft./lbs.
Rocker Stud Torque: 45 ft./lbs. (See Instructions)
Deck Thickness: 5/8”
Combustion Chamber Volume: 64cc
Deck Surface Milling Every .005”-.006” Removed is Approximately 1cc Decrease in Chamber Volume
(Maximum Deck Milling = 060”)
Intake Port Volume: 170cc (E-Tec 170)/200cc (E-Tec 200)
Exhaust Port Volume: 70cc (E-Tec 170)/78cc (E-Tec 200)
Valve Seats: Hardened, Interlocking Ductile Iron. Compatible with Unleaded Fuels
Valve Size: PN 60979 - Intake 1.940”, Exhaust 1.550”
PN 60989 - Intake 2.020”, Exhaust 1.600”
Valve Locks: 3/8” x 7º (#9612)
Valve Spring Retainers: 7º 4140 Steel (#9734)
Valve Spring Diameter: 1.450”
Valve Spring Installed Height: 1.800”
Valve Spring Seat Pressure: 120 lbs.
Valve Spring Pressure @ .581” Lift: 320 lbs.
Maximum Valve Lift: .600”
Rocker Arms: Adjustable, Non-Self Aligning, Roller Rocker Arms Recommended
Self-Aligning Rocker Arms Must Remove Guide Plates and Install Washers Under Rocker Studs
Pushrods: .100” Longer than Stock Required with Stock Type Stamped Steel Rocker Arms.
Hardened Pushrods Required with Guide Plates
Spark Plugs: 14mm x 3/4” Reach, 5/8” Hex, Gasketed Seat
SPECIFICATIONS
Edelbrock Corporation • 2700 California St. • Torrance, CA 90503
Tech-Line: 1-800-416-8628 • E-Mail: Edelbrock@Edelbrock.com
2. Check pushrod-to-cylinder head clearance. YOU MUST CHECK TO ENSURE THAT THERE IS CLEARANCE BETWEEN THE PUSHRODS
AND THE CYLINDER HEADS (.005” minimum).
3. If adequate clearance exists between the pushrod and head, slowly turn engine through at least two revolutions while watching pushrod.
Make sure that pushrod does not rub on the head either at full lift or when the valve is seated.
4. If pushrod rubs on the cylinder head, remove rocker arms, loosen the rocker studs and move the guide plate as needed to provide
clearance.
5. After checking all pushrods for proper clearance, ensure that the tip of the rocker arm is making adequate contact with the top of the
valve stem.
6. Carefully re-torque to 45 ft./lbs. any rocker studs that were loosened. Check alignment again to be sure that the guide plates did not
move while torquing the studs.
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