Milodon Gear Drive - Under Stock 13600, 13700, 13900, 14000, 14100, 14200, 14300, 14500, 14600 - Manual (Page 2)

#13700 AMERICAN MOTORS
When using with stock timing cover, it must be modified and welded to clear idler gear. The outline included
below indicated area to be cut. (shaded area)
Aluminum angle supplied will fit on front cover and should be welded in place. After angle is welded redrill
cover hole, using existing hole as drill guide. see fig 2
#14200 351 Cleveland Geardrive
Due to irregularities between the machined surfaces at the cam and the machine surfaces at the front main the
geardrive plate will have to be shimed accordingly. This can be done by bolting the geardrive plate to the cam
area measuring the clearance between the plate and the block with a "feeler" gauge to determine the shim
dimension. see fig 1 .
#14300 427 SOHC Primary Drive Only
To install gear drive, remove stub shaft from engine and press off both stock gears. Install new stub shaft, then
press on stock secondary gear.
#14600 460 Ford
Due to irregularities in the front timing cover castings from Ford, it may be necessary to grind the inside of the
timing cover in the shaded area shown in figure #3
TIMING THE ENGINE
Once gear drive has been properly installed as far as lash adjustment, we can now
proceed to the timing. There are no dots or line up marks on our gears because these are usually
inaccurate. We start by finding the exact "straight up pattern" (no advance or retard). Once this
position has been found, advancing or retarding cam timing can be done quickly and accurately
without messing around with offset bushings and keyways. All Milodon gear drives use our
venieer cam bolt pattern to set and adjust cam timing.
With the engine disassembled, install cam hub, less the cam gear, on the cam and crank
gear on crank snout. Install degree wheel on crank and set indicator on T.D.C. for #1 cylinder.
Using cam manufacturer's specs, find the #1 intake opening and move crank to that position.
Place dial indicator on #1 intake and open to what the cam manufacturer used for a checking
clearance. For example, if the cam specs were intake opens at 39 degrees BTDC at .050" cam
lift, you would set the crank degree wheel at 39 degrees and the dial indicator on #1 intake at
.050" lift.
The cam and crank are now in the "straight up" position set EXACTLY with 0 degrees
advance or retard. The cam gear is now installed onto the cam hub, with no bolts as yet. It will
engage idler gear teeth and allow the cam gear bolts to exactly align with hub bolt holes in only
one position. (There are 7 bolt holes and, therefore 7 possible positions). Once the correct cam
gear to hub position has been found, install all seven cam gear bolts. These should be torqued to
22 ft/lbs.
Scribe an indicator mark on the cam hub adjacent to any cam gear bolt hole. Mark that
bolt hole with #1. Going clockwise mark the other bolt holes #2 - #7. Now using the chart
supplied, you can advance or retard the cam to any position, from any position. There will be
two tooth locations possible for each bolt hole position. The one for which the cam must be
rotated clockwise to align holes will advance the cam. The one for which the cam must be
rotated counterclockwise will retard the cam.