Mountain Off Road JM500 - Manual

Thank you for purchasing M.O.R.E.™ BombProof™ motor mounts. They are designed to fit Jeep® CJ-5, CJ-7, CJ
-8 vehicles from 1972* through 1986 when installing a Ford V-8 (289,302,351, small block) engine. The JM500
mounts are designed to off-set the engine slightly to the drivers side of the Jeep® frame for front drive shaft clear-
ance at the transmission. This means that you must use a transfer case with a passenger side front drive shaft,
i.e.: Dana 300, Jeep® Dana 20, Dana 18, Borg/Warner Quadra-Trac®.
* 1972-1975 frames require slight modifications for the
JM500 mounts to fit properly.
A short word about Jeep® frames. They had very large tolerances from the factory and the factory used several
“oval slots” instead of round holes to make installing their own parts easier. Add to that fact that most Jeep® vehi-
cles have been used in off-road situations and the frames are usually “tweaked” slightly (or down-right bent!). This
makes it very difficult for us to make these mounts fit perfectly. It may take some effort on your part to make them
fit as you wish. That is one reason that we ship them un-painted so you can modify them as necessary. They are
designed as a starting point and once you have them in place and the engine conversion is completed, you will be
very happy with the end product. We have spent countless hours test fitting them on several chassis with several
engine/transmission combos and the JM500’s fit them all with slight, or no modifications. Remember, you are per-
forming a “conversion” and it will require some effort to complete the project.
The frame side of the JM500 mounts are pre-punched to match the holes on the Jeep® frame, and the block
plates are pre-punched to line up with the Ford engine block. These mounts are designed to locate the engine in
the proper location in relation to the firewall and radiator. We insist that the engine dictate where the rest of the
drive train is located. There is only one perfect location. That is where we have located it. If installing a Ford en-
gine in your Jeep® for the first time, simply use the JM500 mounts to locate the engine by bolting the frame
mounts to the frame, the block plates to the block, then insert the 9/16” thru-bolts. After the engine is bolted in
place, then install the transmission and transfer case.
If you already have a Ford engine converted into your Jeep®, and are replacing the conversion motor mounts with
M.O.R.E.™ BombProof™ mounts, the holes may not line-up with where your engine is located, due to the infinite
possibilities of engine locations. Don’t panic! These mounts will still work! Simply “slide” the frame portion of the
JM500 mounts forward, back, up or down, to where your engine is located and weld the frame mounts to the
frame.
MOUNTAIN OFF ROAD ENTERPRISES LLC.
P O BOX 690
DELTA, COLORADO 81416
970-625-0500
970-625-3747 fax
E-mail: [email protected]
www.mountainoffroad.com
PAGE 1 OF 2
INSTALLATION GUIDELINES for JM500 BombProof™ MOTORMOUNTS:
PLEASE READ THE TERMS-POLICIES ON PAGE 2
D.S. P.S.