* Engine Bay Size: The 1965 Dart's engine bay was designed for smaller engines. A 440 is substantially larger and wider, requiring significant firewall modifications, possibly including notching or even replacing sections of it.
* Subframe Modifications: The Dart's subframe likely won't adequately support the weight and torque of the 440. Reinforcement or even a complete subframe replacement might be necessary.
* Transmission and Drivetrain: You'll need a transmission (likely a heavy-duty automatic like a 727 TorqueFlite) and driveshaft capable of handling the 440's power. These will likely require custom fabrication or significant adaptation.
* Suspension: The stock suspension is not designed for the added weight and power. Upgrades to the suspension, including springs, shocks, and possibly control arms, will be necessary to handle the increased performance.
* Exhaust System: A custom exhaust system will be required to clear the larger engine and chassis.
* Cooling System: The 440 generates significant heat. An upgraded radiator and cooling system are essential to prevent overheating.
* Wiring and Electronics: Adapting the wiring harness to accommodate the 440's electrical system will be required.
In short, while it *can* be done, it's a major project requiring significant fabrication, welding, and mechanical expertise. It's far from a simple swap and would likely be more costly and time-consuming than building a similar-performance car from a more suitable platform. Unless you have significant experience in automotive fabrication and modification, it's best left to professionals or a very experienced hobbyist.
