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Actual valve-to-piston clearance should be specified by your camshaft
manufacturer. Valve-to-bore clearance should also be checked, and
the top of the bore notched for clearance, if necessary.
ACCESSORIES: Although Edelbrock Cylinder Heads will accept most
OEM components (valve covers, intake manifold, etc.), we highly
recommend that premium quality hardware be used with your new
heads.
HEAD BOLTS OR STUDS: High quality head studs or head bolts with
hardened washers must be used to prevent galling of the aluminum
bolt bosses. Edelbrock head bolt kit #8560 includes all bolts which
must be used with these cylinder heads (Also use Edelbrock Head Bolt
Bushings #9680 in place of washers on if installing heads on a 302
block). Stock head bolts may be used with hardened washers.
ROCKER ARMS AND VALVE TRAIN:
designed to use the preferred Boss 302 7/16" stud mounted rocker
arms. Although stock Boss 302 rocker arms may be used (if new lock
nuts are used), we highly recommend using adjustable aftermarket
roller rocker arms such as Crane Cams, Comp Cams, Crower or any
equivalent. Long slot, roller tip rockers may also be used.
VALVE COVERS: Edelbrock Performer RPM cylinder heads will accept
stock Cleveland valve covers. They also will accept Edelbrock valve
covers #4461.
INTAKE MANIFOLD:
Although stock intake manifolds will fit,
Edelbrock Performer RPM Cylinder Heads are matched in size and
operating range with Edelbrock RPM RPM Air-Gap manifold #7564.
Edelbrock intake manifold gasket #7216 is recommended.
NOTE: To ensure maximum performance and a proper seal,
Edelbrock gaskets which are specifically designed and
manufactured for use with Edelbrock parts must be used.
EXHAUST HEADERS: For optimum performance, exhaust headers
and a low restriction exhaust system are highly recommended for use
with Edelbrock Performer RPM Cylinder Heads. Exhaust ports are
CNC-profiled to match Fel-Pro #1430 exhaust gaskets which are
recommended for this application.
SPARK PLUGS: Use 14mm x 3/4" reach gasketed spark plugs. Heat
range may vary by application, but we recommend Champion RC-
12YC (or equivalent) for most applications. Use anti-seize on the
plug threads to prevent galling in the cylinder head, and torque
to 10 ft./lbs. Do not over-tighten sparkplugs! If short reach
plug is used, poor performance and possible engine damage
may occur.
Catalog #61609, #61629
Rev. 10/05 - RS/mc
These cylinder heads are
Edelbrock Corporation • 2700 California St. • Torrance, CA 90503
Tech Line: 800-416-8628 • E-Mail: Edelbrock@Edelbrock.com
INSTALLATION: Installation is the same as for original equipment
cylinder heads. Consult service manual for specific procedures, if
necessary. Be sure that the surface of the block and the surface of the
head are thoroughly cleaned to remove any oily film before installation.
Use alcohol or lacquer thinner on a lint-free rag to clean. Apply oil or
suitable thread lubricant to head bolt threads and the underside of bolt
heads and washers. Torque 1/2" bolts to 100-110 ft./lbs (1/2" bolts)
in four steps (30, 60, 90, 100-110) following the factory tightening
sequence (See Figure 2).
installation of the intake manifold.
NOTES:
BOSS 302 CLONE ENGINES - Use Edelbrock Head Bolt Bushings with
Integral Washers #9680 in place of washers supplied with your head
bolt kit. Torque 7/16" bolts to 65-70 ft./lbs. in four steps (30, 40, 50,
65-70) following the factory tightening sequence (See Figure 2).
ALL ENGINES - A re-torque is recommended after initial start-up and
cool-down (allow 2-3 hours for adequate cooling).
SPECIFICATIONS:
Head Bolt Torque:
Rocker Stud Torque:
Combustion Chamber Volume:
Deck Thickness:
Valve Seats:
Valve Size:
Valve Spring Diameter:
Valve Spring Installed Height:
Valve Spring Seat Pressure:
Max. Valve Lift:
Figure 2 - Cylinder Head Bolt Torque Sequence
Torque Bolts in 4 Steps Following Sequence Above
Page 2 of 2
See intake manifold instructions for
7/16" Bolts: 65-70 ft./lbs.
1/2" Bolts: 100-110 ft./lbs.
(Applied gradually in 4 steps)
50 ft./lbs.
60 cc
5/8"
Hardened ductile iron, non-
interlocking, compatible with
any fuel
Intake - 2.05", Exhaust - 1.60"
1.55"
1.900"
115 lbs.
.600"
(EXHAUST PORT SIDE)
©2005 Edelbrock Corporation
Brochure #63-0352
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