We have found that the 5-speed transmission fitted to these vehicles is very durable and will handle the power of high output V8 engines.

NOTE: Vehicles fitted with the 2.8ltr engine is fitted with a smaller gearbox and is not considered strong enough to handle the power of V8 engines. If you are considering a V8 conversion for this vehicle you must change the transmission to one from a 4.2ltr or alternately you could fit a GM 3 or 4-speed automatic transmission to the original transfer case. Should you use an automatic transmission with your V8 conversion we would recommend you fit a set of extra low range gears to help regain your engine braking.

The kit consists of an adaptor housing which couples the new engine to the original petrol or diesel bellhousing. The new adaptor housing measures 72 mm in length and spaces the new engine away from the irregular shape of the Nissan Patrol firewall.

No firewall modifications or re positioning of the original transmission is required.

An input shaft extension is also supplied with the kit, which fits over the original gearbox input shaft. A sealed ball bearing supplied in the kit supports the input shaft extension at the front. The gearbox input bearing supports the rear so no movement is experienced. The input shaft extension converts the Nissan gearbox splines to standard GM 10T dimensions.

A standard GM flywheel and flat-fingered diaphragm clutch is used for the conversion.

We recommend using the GM pressure plate when fitting a high performance V8 engine as it has more clamping pressure than the Nissan Patrol pressure plate, this will prevent clutch slippage.

A flywheel cover plate, thrust bearing extension carrier, spigot bush as well as all the required bolts are supplied with the kit.

When ordering 308 Holden V8 kits, please make sure the bolt pattern at the rear of the engine is Turbo (Chevy) pattern as no housing is available for the Trimatic bolt pattern.

Commodore VR, VS, and VT engine management computers require a stream of data to be sent to them from the body control module, prior to starting the engine. This is part of the vehicles anti theft system. The stream of data required by the ECM/PCM is special. Fortunately the input to the ECM/PCM can be switched off by changing the program information in the mem-cal. Marks 4WD Adaptors can supply mem-cals on an exchange or out right basis.

Marks 4WD Adaptors now manufacture a body control simulator that can be used in place of the VR or VS BCM. The simulator sends a stream of data to the PCM, which gives it permission to start just as the original BCM did. For VS model PCM's the simulator is also equipped with an output to switch a thermo fan relay.

Engine mounting kits are also available to fit the GM V8 engines. These kits consist of engine mounting rubbers, bolts, and new chassis brackets. The old chassis brackets will need to be cut off the chassis and the new ones welded back on.

The engine mountings have been designed to give you sufficient legal sump to differential clearance when using a rear bowel GM sump.

The Nissan viscous coupled fan is very effective as the coupling, when heated by the warm air from the radiator, virtually locks the fan directly to the water pump rapidly cooling the engine. Marks 4WD Adaptors manufacture an adaptor kit that easily couples the the Chevy and Holden V8 water pump and pulley to the Nissan viscous coupling and fan.