Header, exhaust, block hugger, Gen III IV, stainless, ceramic coated, V band

Novak's Gen III & IV LS Vortec block hugger headers are the "next level", featuring stainless steel construction and coated in metallic ceramic. Their advanced V-band clamp design seals easier and better than previous styles and they are tested to clear all Novak engine mounts. Learn more about them....

Header, exhaust, block hugger, Gen III IV, stainless, ceramic coated, V band644.00

Kit MM-B, isolators, upper and lower replacement bushings, includes hardware

While we expect our urethan bushings to last a good long time, you can these spares into your Jeep's toolbox just in case. Our engine bushings are backwards compatible with Novak engines mounts going as far back as the 1970's.

Kit MM-B, isolators, upper and lower replacement bushings, includes hardware48.80

Radiators for GM to Jeep Conversions

Cooling a powerful engine in a Jeep takes serious radiator and fan combinations. Learn more about ours, here.

Pilot Bushings for your Jeeps

Many engine conversions will be up against manual transmissions. We offer pilot bushings for just about all of the combinations that we've encoutered over the years. See them here.

GM Fuel Injection Components for CJ Jeeps

Take advantage of your Jeep fuel pump module, while upgrading it to feed your new GM engine. There are a few kits available depending on your engine situation. Learn about them, here.

Installation Requirements

Old Mount Removal

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.

Engines & Engine Mounting

Engine placement in these Jeeps should consider the following points:

• Left-right offset location is similar to factory at ~1-1/4" to the driver's side
• Avoid installing the engine too low (axle clearance and other issues)
• Avoid installing the engine too high (transmission tunnel interference, etc.)
• Set your engine to 4-7 degrees of tilt rearwards, like the factory engine & powertrain
• It is usually best that Chevy and Gen III+ V8 engines install approximately 3" further forward, using the back of the engine block face as the datum
• When mocking up your engine installation location, pay special attention to radiator and fan clearance.
• Firewall modifications are not expected.

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.

Driveshafts

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.

Axles

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.

Also See

• GM Engine Swaps Into the CJ2A Universal, 1944-1949
• GM Engine Swaps Into the CJ3A Universal, 1949-1953
• GM Engine Swaps Into the CJ3B Universal, 1953-1968
• GM Engine Swaps Into the M38 Universal, 1950-1952
• GM Engine Swaps Into the M38A1 Universal, 1952-1957
• GM Engine Swaps Into the Utility Trucks & Wagons, 1947-1964
• GM Engine Swaps Into the DJ Dispatcher, 1955-1984
• GM Engine Swaps Into the CJ5 Universal, 1955-1971
• GM Engine Swaps Into the FC150 & FC170 Forward Control Truck, 1957-1964
• GM Engine Swaps Into the C101 & C104 Jeepster Commando, 1966-1973
• GM Engine Swaps Into the CJ5 & CJ6 Universal, 1972-1975
• GM Engine Swaps Into the CJ5 & CJ7 Universal, 1976-1979
• GM Engine Swaps Into the CJ5 & CJ7 & CJ8 Universal, 1980-1986
• GM Engine Swaps Into the FSJ Trucks, Wagoneers & Cherokees (1962-1991)
• GM Engine Swaps Into the M715 / M72x Kaiser Militaries (1966-1971)
• GM Engine Swaps Into the YJ Wranglers (1987-1995)
• GM Generation III+ V8, 1997-2010+ (LSx, Vortec, etc.)

Bolt-In Mounts vs. Universal Mounts

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.