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EXHAUST HEADERS: Any header or manifold designed for original
equipment heads will fit the Edelbrock Street Cylinder Heads. Exhaust
ports are CNC-profiled to match Edelbrock part #7205 exhaust gaskets
which are recommended for this application.
VALVE SPRING SEATS/LOCATORS: If hardened valve spring seats are
preferred for your application, valve spring seats, #5770 (set of 16), are
available. This spring seat/locator is designed for the #5745 valve
springs that are standard in the #6047 complete cylinder heads. The
spring seat/locator has a register for the I.D. of the inner spring that has
a .795" dia. and the seat O.D. is 1.52". The spring seat thickness is
.060".
SPARK PLUGS: Use 14mm x 3/4" reach gasketed spark plugs. Heat
range will depend on the application.
equivalent is a good starting point.
Head bolt torque:..................................................................................65 ft./lbs. (short bolts; #11, #5, #4, and #10), 75 ft./lbs.
Rocker stud torque:..............................................................................45 ft./lbs.
Combustion chamber volume: ..............................................................110 cc
Deck thickness:....................................................................................9/16"
Valve Seats: .........................................................................................Hardened, interlocking, compatible with unleaded fuels
Valve Size:............................................................................................Intake- 2.19", Exhaust- 1.88"
Valve Stem Diameter: ...........................................................................11/32"
Valve Spring Diameter: .........................................................................1.54"
Valve Spring Installed Height:...............................................................1.975"
Valve Spring Seat Pressure:..................................................................120 lbs.
Max. Valve Lift: .....................................................................................700"
Bolt Boss Height
A = 3.38"
B = 2.88"
C = 4.44"
D = 1.38"
PLEASE complete and mail your warranty card. Be sure to write the model number of this product in the "Part #____" space. THANK YOU.
Catalog #60469 & #60479
Rev. 3/05
The Champion RC-12YC or
Edelbrock Corporation • 2700 California St. • Torrance, CA 90503
Tech Line: (800) 416-8628 • E-Mail: Edelbrock@Edelbrock.com
Use anti-seize on the plug threads to prevent galling in the cylinder head,
and torque to 10 ft./lbs. DO NOT OVERTIGHTEN SPARKPLUGS!
INSTALLATION: Installation is the same as for original equipment
cylinder heads.
necessary. For 454 and smaller Mark IV engines use Edelbrock head
gasket #7302. For 454 Mark V engines use Fel-Pro head gasket #1037
or equivalent. For 502 c.i.d. Mark V engines use Fel-Pro head gasket
#1047 or equivalent. Be sure that the surface of the block and the
surface of the head is thoroughly cleaned to remove any oily film before
installation. Use alcohol or lacquer thinner on a lint-free rag to clean.
Apply liquid teflon or suitable thread sealer to head bolt threads. Torque
short bolts to 65 ft./lbs. and long ones to 75 ft./lbs. in three steps
following the factory tightening sequence (see Figure 1). A re-torque is
recommended after initial start-up and cool-down (allow 2-3 hours for
adequate cooling).
SPECIFICATIONS
(Long bolts; all others)
Page 2 of 2
CAUTION
Consult service manual for specific procedures, if
©2005 Edelbrock Corporation
Figure 1
Brochure #63-0065
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