While some enthusiasts *do* perform these swaps, it's a very extensive and expensive project requiring:
* Engine mounts: Custom engine mounts need to be fabricated to fit the V8 in the engine bay.
* Transmission: The existing transmission likely won't work with a V8. You'll need a compatible automatic or manual transmission, and possibly a custom driveshaft.
* Wiring harness: The existing wiring harness is not designed for the V8's electrical needs. A new harness, or significant rewiring, is required.
* Exhaust system: A completely new exhaust system needs to be fabricated.
* Cooling system: The existing cooling system might be inadequate for a V8's higher heat output, requiring upgrades to the radiator, hoses, and potentially the water pump.
* Computer/ECU: You'll likely need a compatible computer to control the V8 engine and associated systems.
* Body modifications: You may need to make modifications to the firewall or other parts of the body to accommodate the larger engine.
Popular V8 swap candidates (but still requiring massive work):
* Small Block Chevrolet (SBC): A popular choice for GM vehicles due to availability of parts and aftermarket support. Even this relatively compact V8 requires significant modification.
* LS Series (GM): More modern and powerful than the SBC, but even more challenging to install due to their complexity and size.
In short: While theoretically possible, swapping a V8 into a 2002 GMC Jimmy is a major undertaking typically reserved for experienced mechanics with fabrication skills and access to specialized tools and parts. The cost and labor involved often outweigh the benefits for most people. Consider the significant expense and difficulty before undertaking this project.
