Challenges:
* Engine bay space: The 1JZ is larger and heavier than the 5M-GTE. You'll likely need to modify the engine bay, potentially cutting and welding to accommodate it.
* Mounts and brackets: The 1JZ uses different mounting points and brackets than the 5M-GTE. You'll need to fabricate custom mounts or find aftermarket solutions.
* Transmission: The 1JZ typically uses a different transmission than the 5M-GTE. You'll need to find a compatible transmission and potentially modify the drivetrain.
* Wiring and electronics: The 1JZ uses a different ECU and wiring harness. You'll need to adapt the existing wiring or install a standalone ECU.
* Exhaust system: The 1JZ has a different exhaust manifold and piping. You'll need to modify the existing exhaust system or install a new one.
What you'll need:
* Extensive mechanical knowledge: You'll need to be comfortable with fabrication, welding, and electrical work.
* A donor 1JZ engine and transmission: Find a suitable engine and transmission from a compatible Toyota model.
* Custom parts: You'll likely need to source custom mounts, brackets, and potentially other parts.
Alternatives:
* Consider the 2JZ-GE or 2JZ-GTE: These engines are slightly larger than the 1JZ, but they're more readily available and fit into the 1982 Supra with less modification.
* Upgrade the existing 5M-GTE: You can enhance the performance of the existing engine with upgrades such as a turbocharger, intercooler, and exhaust system.
Conclusion:
While it's possible to fit a 1JZ into a 1982 Supra, it's a complex and challenging process. You should carefully weigh the pros and cons and consider the resources and skills you have before attempting this project. If you're not comfortable with engine swaps and modifications, it's best to consult with a qualified mechanic or shop.
