Our MMX series of mounts offer the most strength, adjustability, and modularity available for Gen III & Gen IV Vortec LS engines in Jeeps.
Two kits are available for either narrow or wide frame style Jeeps, as follows:
These mounts are weld-in style and detailed instructions will guide to an ideal installation.
The Novak mounts feature thick 3/16” laser cut and CNC bent steel construction. Engineered using advanced CAD modeling and real world testing, these mounts have shown to handle even the wildest V8.
Each mount kit comes with our high-grade urethane isolators that are specified for that ideal balance of isolation and firmness with the power of modern engines. Substantial 5/8” through bolts capture the assembly. Replacement bushing sets are available below should replacement ever be needed.
Geometry of the mounts is compact to provide clearance for all stock components including the steering shaft with its pillow block and the recommended exhaust headers below.
The design on these mounts allows outstanding placement freedom in most any vehicle that meets the width requirements and has parallel frame channels. They have a large adjustment range for placement in the vertical, left-right offset, and longitudinal directions.
All parts except the frame brackets are zinc coated for resistance against corrosion. As the frame brackets are welded to the frame, any finish on the frame side brackets as well as the frame would be burned. The welded channels will need to be finished but you may enamel, powder coat, or otherwise finish the bracketry and adjacent frame area to your own style.
Unbolting or cutting is required to remove the factory frame mounts for factory Jeep engines. This process will vary from model to model. you will want to completely remove and smooth the surface of your frame rails for a nice fitment of the new engine mount channels to your frame.
Engine placement in these Jeeps should consider the following points:
Since Jeeps featuring the T18 transmission are "high-hood", clearance for classic Small Block and high Vortec (truck style) intakes and accessories is not a problem.
Novak Gen III+ engine mounts for 1976-1986 Jeep CJ models will remove any guesswork from the engine installation location as they are predetermined for the best location and engine clearance margins.
Driveshaft length changes may be required. Chevy engines can install up to 3" further forward than AMC engines (using the back face of the block as the datum point) for exhaust clearance, firewall access, etc.
Some installers, concerned about the expense of new or modified driveshafts, attempt to let the existing driveshafts dictate engine, transmission and transfer case location, often to the detriment of the project. Our recommendation is to prioritize the correct position of drivetrain components over saving a few dollars which is usually regretted in the long run with compromised positioning.
Jeeps that require extensive travel or specialty-built driveshafts have this option available through several fabricators across the nation. These are normally specified after placement of the new transmission and measured at vehicle ride height. As the rear driveline gets shorter, it is often advantageous to us a Double Cardan or “CV style” rear shaft with the correct geometry at the axle to minimize vibrations and possible binding.
Use of factory axles is completely acceptable with this conversion. Axle upgrades are not necessary, but they may be chosen for reasons external to this transmission upgrade.
We at Novak receive many compliments on our engine mounts. Many customers find that it is liberating to install their engine where they determine is the best place.
In some situations, Novak offers bolt-in (predetermined location) engine mounts for some Jeeps. However, if our bolt-in mounts are not available for your model or you want the liberty to determine your engine location, these mounts or Novak's #MMX series mounts should be considered.