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©2003 Edelbrock Corporation
Brochure No. 63-0079
Page 2 of 2
Rev. 1/03
(a) Place a small amount of clay on the front end of both axles as
shown in Figure 3.
NOTE: It will be necessary to cut material off rib inside front cover
to hold idler gears in place.
(b) Install front cover with gasket in place.
(c) Remove cover and measure the thickness of the compressed clay.
It should be .005"-.030". Do not tighten cover down until proper
clearance has been obtained. Without sufficient clearance, there is
risk of cracking the cover when tightened down.
(d) If clearance is less than .005, you will need to grind off idler axle as
shown to obtain proper clearance. If clearance is greater than .090,
replace left side (larger idler side) stud with tapered end axle
provided in the kit. Re-install idler assembly and recheck for
minimum clearance between block and front cover.
8. With all gears correctly in mesh and timed, tighten the camshaft
capscrew to 35 ft./lbs. It would also be a good idea to use Locktite™ or
equivalent on the bolt threads prior to final assembly.
9. Lubricate all gears and bearings with engine oil.
10. Re-install the front cover.
11. Re-install all components removed in preparation for step 1.
Figure 1
Accu-Drive for Ford 289/302/351-W V8s
Power idler (22 teeth)
Timing Mark
Reverse idle (20 Teeth) should have
between .005-.070 free vertical travel with
power idler in hard mesh with cam and
crank gears
Camshaft timing can be advanced or retarded by
4° (crankshaft degrees) from stock timing by using
the appropriate alternate timing keyways in crank
gear.
1
2
Timing Mark
3
View looking at front of engine
Legend
1-Crank gear
2-Large Idler gear
3-Cam gear
4-Small Idler gear
4
ÌÌ
0
R
A
Must use Brass
Thrust Ring
(0.032" thick)
Camshaft
retaining
plate
Figure 2
289/302/351-W Ford
Cam Gear Assembly
Figure 3
Idler Axle Clearance Stock Ford
Front Cover
Remove material on this end of
axle to obtain correct clearance
(.005"-.030")
Place clay in this area
to check shaft end
clearance
Cut off rib as necessary to hold
idler gears in place
Block
Crankshaft
Edelbrock Corporation
2700 California Street
Torrance, CA 90503
Toll-Free Tech Line: 1-800-416-8628
Tech E-mail: edelbrock@edelbrock.com