* Extensive chassis reinforcement: The Neon's unibody structure is not designed for the weight and power of a V8. Significant reinforcement would be needed to prevent catastrophic failure.
* Custom engine mounts: New engine mounts would need to be fabricated to support the V8.
* Modified transmission and drivetrain: The Neon's transmission and axles would not be strong enough to handle the V8's torque. A much stronger transmission and likely custom driveshafts would be required.
* Custom exhaust system: A completely new exhaust system would need to be designed and fabricated.
* Cooling system upgrades: The stock cooling system would be woefully inadequate; a much larger and more efficient radiator and cooling system would be necessary.
* Fuel system upgrades: The fuel system would need significant upgrades to supply enough fuel for the V8.
* Electrical system upgrades: The Neon's electrical system might need upgrades to handle the increased demands of the V8.
* Bodywork modifications: Depending on the size of the V8, the engine bay might need to be significantly altered or even widened. The hood would certainly need to be modified or replaced.
The cost of all these modifications would far exceed the value of the car, making it a financially irresponsible project. The resulting car would also likely be very difficult to register and insure.
In short, while technically feasible, putting a V8 in a Dodge Neon is impractical, expensive, and likely unsafe without extensive engineering expertise.
