Here's why it's so challenging:
* Engine Bay Size: The 360 is considerably larger and heavier than the 3.0L. You'll almost certainly need to modify or replace the engine mounts, and potentially even firewall and bodywork to accommodate the larger engine.
* Transmission: The 3.0L likely used a different transmission than what's ideal for a 360. You'll probably need to source a transmission compatible with the 360 (likely a larger, heavier-duty unit) and adapt it to the LeBaron's existing drivetrain. This includes the driveshaft, potentially the rear differential, and associated components.
* Wiring Harness: The wiring harness for the 3.0L is not compatible with the 360. You'll need to either modify the existing harness extensively (a complex and challenging task) or fabricate a completely new harness.
* Exhaust System: The exhaust system will need to be completely custom-fabricated to fit the larger engine.
* Cooling System: The 360 generates significantly more heat than the 3.0L. You might need a larger radiator, different cooling fan, and possibly other upgrades to ensure adequate cooling.
* Computer Control: The 360 will likely require a different engine control unit (ECU) and potentially other sensors.
In short, this isn't a weekend project. It requires significant mechanical skill, fabrication abilities, and access to specialized tools and parts. The cost could easily exceed the value of the car, unless you're doing most of the work yourself.
Before attempting this swap, thoroughly research the specific details of the 1990 LeBaron's chassis and the 360 engine you're considering. Look for forums and online communities dedicated to Mopar (Chrysler) vehicle modifications. They can offer invaluable advice and insights into the challenges and solutions involved in such a project.
