Edelbrock X 75-79 User Manual
©2008 Edelbrock Corporation
Brochure #63-65063
Catalog #65063, #65073, #65083, #65123
Rev. 4/08 - AJ/mc
Page 1 of 2
EDELBROCK RETRO-FIT HEADER SYSTEM
For GM Bodies: A ‘64-’67, ‘68-’72; F ‘70-’81; and X ‘75-’79
Catalog #65063, 65073, 65083, 65123
INSTALLATION INSTRUCTIONS
Please study these instructions carefully before installing your new Edelbrock Retro-Fit LS1 Header System. If you have any
questions, please contact our Technical Hotline at: 1-800-416-8628 , 7am - 5pm, Monday-Friday, Pacific Standard Time or e-mail
us at Edelbrock@Edelbrock.com.
DESCRIPTION: These header systems are designed to improve the exhaust efficiency of either the Vortec style head equipped
Small Block Chevrolet engine or the LS series engine as it is used in the A, F, or X-body chassis. It is highly recommended to use
the Edelbrock Engine Mounting Adapter Plates # 6701 for the LS series engine headers #65063 or #65073. These headers are
designed to work with the corresponding Edelbrock Header-Back for the appropriate chassis style.
Suggested Tools for Installation:
❑ SAE and metric sockets, ratchets, and wrenches ❑ Floor jack and load rated jackstands
APPLICATIONS: HEADER COMPONENTS:
IMPORTANT NOTE:
Proper installation is the responsibility of the installer. Improper installation will void
warranty and may result in poor performance and engine or vehicle damage.
KIT CONTENTS (#65063 & #65073): KIT CONTENTS (#65083 & #65123):
Part #: Year Range: Body Style: Engine Family:
65063 1964 - 1967 A LS1
65073 1968 - 1972 A LS1
65073 1970 - 1981 F LS1
65073 1975 - 1979 X LS1
65083 1964 - 1972 A Vortec
65123 1970 - 1981 F Vortec
65123 1975 - 1979 X Vortec
Part #: Quantity: Component #: Description
65063 1 25-9825 Left Header
65063 1 25-9826 Right Header
65073 1 25-9810 Left Header
65073 1 25-9811 Right Header
65083 1 25-9821 Left Header
65083 1 25-9822 Right Header
Quantity: Component #: Description:
2 54-8200 3” Donut Gaskets
2 54-6600 LS series Port Flange Gaskets
12 68-0350 8mm - 1.25 x 30mm Bolts
12 82-4620 8mm Lock Washers
12 82-8721 8mm Hardened Washers
4 68-8565 3/8” - 16 x 2-1/2” Hex Bolts
4 82-5240 3/8” Flat Washers
4 82-5590 3/8” Lock Washers
4 60-9185 3/8” - 16 Hex Nut
2 52-9710
O2Sensor Bungs
2 23-4113 Collector Flange
2 79-9027 Collector Ext. (Stub Tube)
Quantity: Component #: Description:
2 54-8200 3” Donut Gaskets
2 54-6590 Port Flange Gaskets
12 36-0716 3/8” - 16 x 1” Header Bolts
4 82-7231 3/8” Hardened Washers
4 68-8565 3/8” - 16 x 2-1/2” Hex Bolts
4 82-5240 3/8” Flat Washers
16 82-5590 3/8” Lock Washers
4 60-9185 3/8” - 16 Hex Nut
2 23-4113 Collector Flange
2 79-9027 Collector Ext. (Stub Tube)
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©2008 Edelbrock Corporation
Brochure #63-65063
Catalog #65063, #65073, #65083, #65123
Rev. 4/08 - AJ/mc
Page 2 of 2
WARNING!!!
Exhaust gas contains carbon monoxide, a deadly invisible gas. Correct any leaks before driving!
Edelbrock Corporation, 2700 California St., Torrance, CA 90503
Tech Line: (800) 416-8628 Office: (310) 781-2222
E-Mail: Edelbrock@Edelbrock.com
1. Raise and support vehicle at least 16” off of the ground.
2. Remove any existing exhaust manifold and or pipes that will interfere with the installation of the headers.
3. On some vehicles, it may be necessary to remove the steering shaft. Mark its orientation to the connector at the steering box,
remove clamp bolt, and slide shaft off of the steering box input shaft.
4. Install the headers on to the engine using the supplied gaskets, bolts, and washers. Install all the header bolts in the header
before tightening them. Removal of the starter will make header installation easier in some applications.
5. If the steering shaft was removed, install the shaft on to the steering box making sure to align the marks made in step 3.
6. Install supplied donut on to the collector outlet of the header.
7. O2 sensor bungs are supplied in systems #65063 & #65073. They should be placed according to the recommendations of the
EFI system or AFR metering device you are using, but are not generally required for carbureted applications.
Note: Edelbrock Header-Back Exhaust Systems are designed to bolt directly to the collector of these headers.
INSTALLATION PROCEDURE
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