* Frame Reinforcement: The YJ's frame isn't designed for the weight and power of a V8. You'll likely need to reinforce it considerably to prevent bending or cracking under stress.
* Engine Mounts: Custom engine mounts will be necessary. No readily available kit exists for this swap.
* Transmission: You'll need a transmission capable of handling the V8's torque. This often means using a stronger transmission, potentially from a different vehicle, and likely requires a custom driveshaft.
* Driveshafts: The stock driveshafts are not strong enough and will likely need to be replaced with stronger, potentially custom-made, units.
* Suspension: The stock suspension will struggle with the added weight of the V8. A suspension upgrade, including heavier springs, shocks, and potentially a lift kit, is practically mandatory.
* Cooling System: A V8 generates significantly more heat than the stock engine. You'll need a larger radiator and possibly upgraded cooling fans to prevent overheating.
* Exhaust System: A custom exhaust system will be needed.
* Wiring: The electrical system will need modification to accommodate the V8's needs.
* Brakes: Upgraded brakes are usually necessary to handle the increased power and weight.
In short, while it's *possible*, it's a complex and expensive project requiring significant mechanical skills, welding experience, and fabrication abilities. It's not something a novice should attempt. Many people choose to use a smaller V8, like a small block Chevy, for this swap, as it's slightly easier to manage than a larger displacement V8. However, even a smaller V8 still requires considerable work.
