Edelbrock 262-400 - Manual (Page 4)

MANIFOLD AND CARBURETOR HEIGHT:
1. Remove the air cleaner.
2. Lay a straightedge (such
as a yardstick) across
top of carburetor from
front to back.
3. Measure from block and
manifold end seal
surface.
See Figure 3.
4. Record measurements
in blank spaces labeled
OM1 and OM2.
5. Measure height of
carburetor and record in
space C3.
NOTE: Most 4-bbl carburetors are about 3-1/4" tall (mounting
flange to air cleaner flange).
© 2001 Edelbrock Corporation
Brochure No. 63-0048 Page 2 of 8
Rev 1/02
THINGS TO DO BEFORE YOU REMOVE THE STOCK
MANIFOLD
TOOLS AND EQUIPMENT:
Use the following checklist for items needed:
❑ Box and open end wrenches
❑ Socket set
❑ Distributor wrench
❑ Pliers (channel locks and hose clamp)
❑ Screw drivers (regular and Phillips)
❑ Torque wrench
❑ Hammer
❑ Gasket scraper or putty knife
❑ Timing light
❑ Vacuum gauge
❑ Rags
❑ Water bucket
SHOPPING LIST:
❑ Gaskets-Edelbrock, OEM or OEM equivalent
❑ Pipe plugs, if needed
❑ Edelbrock Gasgacinch (#9300)
❑ RTV High Temp silicone sealer or O/2 sensor safe
❑ Masking tape
❑ Modeling clay or putty
❑ Chalk
❑ Paper and pencil
❑ Radiator coolant
❑ Vacuum gauge
❑ Teflon thread tape or PST thread sealer or equivalent
❑ Check manifold instruction sheet for catalog numbers of Edelbrock
or OEM parts needed for your installation.
CHECKING HOOD CLEARANCE:
NOTE: Check hood clearance BEFORE removing stock
manifold.
1. Use modeling clay or putty and make five stools, two or three
inches high.
2. Position stools on air cleaner at front, rear, each side and on center
stud. See Figure 1.
3. Close hood to locked position and re-open.
4. See Figure 2 and record measurements in blank spaces labeled A-
B-C-D-E.
5. These figures show the amount of clearance between the hood
and the air cleaner.
CLAY CONE
2-3"
AIR CLEANER
A
B
C
E
D
FO
R
W
ARD
HEIGHT B
FO
R
W
ARD
HEIGHT A
HOOD CLEARANCE
A
B
C
E
D
FO
R
W
ARD
6. Place straightedge on top of new manifold including any adapters
or gaskets you plan to use.
7. Measure distance from end seal surface as you did on stock
manifold. See Figure 4.
8. Record measurements in spaces NM1 and NM2.
9. Add carburetor measurement C3 to new manifold figures you
recorded.
10. If the new combination is taller, subtract this amount from the hood
clearance figure for the new hood clearance.
CAUTION: You must maintain at least 1/2" clearance between
the hood and air cleaner because of engine torque. If you have
insufficient clearance, a low profile air cleaner may solve the
problem.
NOTE: On engines without end seal surfaces, select a standard
point from
which to
measure.
Fig. 1
Fig. 2
Fig. 3
Fig. 4