What’s Involved in an FJ60 LS Swap?
An FJ60 LS swap is a popular modification among Land Cruiser enthusiasts looking to increase power, improve drivability, and modernize performance. This process involves replacing the factory inline-six engine with a GM LS-series V8, known for reliability, aftermarket support, and impressive horsepower-to-weight balance.
Engine Selection
- Common choices – LS1, LS3, and LQ4 are frequent picks depending on budget, desired power, and availability.
- Power output – Depending on the engine, output can range from 300 to over 400 horsepower.
- Fuel system – The swap often includes upgraded fuel pumps, lines, and filters to meet LS requirements.
Transmission & Drivetrain
- Adapter kits – Used to connect the LS engine to the FJ60’s original transmission or a modern gearbox.
- Transmission upgrades – Many choose GM automatic transmissions like the 4L60E or 4L80E for improved highway performance.
- Transfer case integration – Retaining the original transfer case keeps the Land Cruiser’s 4WD capability intact.
Electrical & Cooling Systems
- Wiring harness – A custom or standalone harness ensures the LS engine communicates with the vehicle’s electrical system.
- ECU tuning – Necessary for optimal performance and fuel efficiency.
- Radiator upgrades – A high-capacity cooling system is necessary to handle the V8’s heat output.
Exhaust & Mounting
- Motor mounts – Custom or aftermarket mounts position the LS engine correctly in the engine bay.
- Exhaust fabrication – Custom headers and piping accommodate the new engine’s layout.
- Clearance adjustments – Some firewall or frame modifications may be needed for fitment.
An FJ60 LS swap transforms the vehicle’s performance, offering better acceleration, higher top speeds, and improved highway cruising. While the process requires mechanical expertise, the result is a powerful and reliable Land Cruiser capable of tackling both modern roads and demanding trails.