Brochure #63-0067
© 2003 Edelbrock Corporation
Rev. 1/03
SQUARE-BORE CARB TO SPREAD-BORE MANIFOLD
ADAPTER #2696 AND UNIVERSAL FUEL LINE KIT #2697
(for OEM Spread-bore manifolds with 3/8" or 5/16" fuel line)
INSTALLATION INSTRUCTIONS
®
1—Square-bore carburetor adapter (#2696) #
4—Carb studs; 5/16" x 1-1/2” (Carb to adapter) #
4—Nuts; 5/16"-24 #
4—Lock Washers; 5/16" #
1—Gasket; Square-bore #
1—Gasket; Spread-bore #
4—Fillister Head Bolts 5/16” x 3/4” (Adapter to intake) #
KIT CONTENTS
1—Brass Compression Nut/Sleeve; 3/8" *
1—Brass Compression Sleeve/Nut; 5/16" *
1—3/8" Rubber Fuel Line; 24" long *
4—Stainless Steel Worm-type Hose Clamps *
1—Fuel Filter; 3/8" Inlet and Outlet *
1—Special Brass Adapter; 5/16" *
1—Special Brass Adapter Fitting; 3/8" *
DESCRIPTION:
The Edelbrock Square-bore Carb to Spread-bore Manifold Adapters are designed to allow installation of
the Edelbrock Performer Series carburetor on vehicles with the OEM (original equipment) spread-bore intake manifold
(typically GM vehicles that were originally equipped with the Rochester Quadrajet carburetor). These kits will also work on
Chrysler manifolds designed for the Thermo-Quad carburetor. It contains the necessary items to adapt the EPS carb to the
OEM manifold. A high-capacity fuel filter is also incorporated in the 2697 fuel line kit to ensure that clean fuel is supplied
to the carburetor.
INSTALLATION:
Before removing the old carburetor, make a note of any special or unusual linkage or mounting
requirements. EGR valves, kickdown linkages, cruise control linkages, air cleaner heat stove ducting, etc., all may require
extra parts, adapters, or extensions to complete your installation. Consult your Edelbrock Performer Series carburetor
Owner’s Manual and installation instructions for recommendations or call our
Technical Hotline at:1-800-416-8628,
Monday-Friday, weekdays.
Note:
The carb adapter will raise the carburetor by over 3/4" and some air cleaners will require additional spacers for
carburetor clearance, especially on carbs with electric chokes. The total height (carb spacer plus air cleaner spacer) must
be calculated and hood clearance checked before proceeding with your installation. Check air cleaner-to-hood clearance by
placing several large clay posts at various points on top of your air cleaner, then close the hood to compress the posts.
Measure the thickness of the clay posts to ensure that adequate clearance exists.
Note: All items marked with asterisk (*) refer to #2697 kits only
.
Items marked with (#) are included
in both Kits.
1. Remove OEM air cleaner and check for fit on your new
EPS carburetor. If additional clearance is required, use air
cleaner spacer #8092 (3/8" thick) or #8093 (1/2" thick).
You may want to use a new air cleaner designed
specifically for EPS carbs (including those with electric
chokes): Order Edelbrock Signature Series Air Cleaner
#1221 (chrome-plated steel) or Elite Series Air Cleaner
#4221 (polished aluminum).
2. Before removing vacuum lines, note whether each is
connected to a “full-time” or “timed” vacuum port on the
old carburetor. “Full-time” ports will have vacuum at idle,
and “timed” ports will not show any vacuum until the
engine rpm is increased; usually to about 1500 rpm. Mark
each vacuum line with masking tape so that it may be re-
connected to the appropriate port on the new carburetor.
3. Disconnect all fuel lines, linkages, choke mechanisms, etc.
Remove old carburetor, gasket, and carb mounting studs.
Place clean rags or towels in the manifold throttle bore
openings to prevent debris from falling into engine. Clean
the gasket surface and surrounding area.
4. Remove rags or towels from the manifold and place
matching (spread bore) gasket on intake manifold and
secure spacer with fillister bolts. Install the four new carb
studs. “Double-nutting” the studs is preferred over
gripping with pliers. Place matching (square bore) gasket
on carb spacer. Install carburetor with new lock washers
and nuts and hand tighten lightly and evenly in a “criss-
cross” pattern.
Note: These adapters have a 1/4" NPT hole in the
back, which can be drilled if an additional vacuum
source is needed.
Adapter
Plate
Squarebore
Gasket
Spreadbore
Gasket
