What’s Involved in a Land Cruiser V8 Swap?

February 28, 2025

Swapping a V8 engine into a Toyota Land Cruiser is a popular upgrade for owners seeking improved performance, towing capacity, and modern drivability. If you choose a GM LS-series, Toyota 1UR-FE, or another V8, the process is complex and requires careful planning, quality parts, and precision installation.

Engine Selection

GM LS V8 – Most common due to availability, support, and proven reliability
Toyota V8 (1UR-FE, 3UR-FE) – Keeps the build all-Toyota and integrates more easily with existing systems
Diesel Options – Some opt for V8 diesels for torque and fuel economy in overlanding applications

Key Components Required

Engine Mounts and Adapters – Custom or aftermarket mounts align the V8 with the frame
Transmission Compatibility – Either swap the transmission or use an adapter to retain the stock one
Wiring Harness and ECU – Custom or modified harnesses allow the V8 to communicate with factory electronics
Cooling System – Upgraded radiator, fan, and shrouds are needed to handle the additional heat
Exhaust System – Custom headers and routing to fit the tighter engine bay
Fuel Delivery – High-pressure fuel pumps, lines, and return systems must match the V8’s requirements
Driveshaft Adjustments – May require modification for proper length and angle
Gauges and Sensors – Interface modules or new gauge clusters ensure accurate readouts

Fabrication & Labor

Some cutting, welding, or firewall modifications may be needed
Engine bay clearances must be measured carefully to avoid clearance issues
Mounting brackets, throttle linkage, and transmission tunnel may require custom work

Legal & Emissions Compliance

Many states require the swap to comply with local emissions laws
The engine must often be from the same year or newer and retain all emissions equipment
Smog certification or referee inspections may be necessary

Time & Cost Estimate

Time – A well-prepped shop may complete the swap in 2 to 4 weeks
Cost – Ranges from $10,000 to $30,000 depending on parts, labor, and level of customization