The dream of swapping a powerful Cummins diesel engine into a classic 1973-1987 Chevy truck is a popular one. The combination of robust reliability and impressive torque makes for a compelling upgrade. However, this isn't a weekend project; it's a significant undertaking requiring planning, skill, and the right parts. This guide dives into the specifics of a 73-87 Chevy Cummins conversion kit, addressing common questions and concerns.
What's Involved in a 73-87 Chevy Cummins Conversion?
A Cummins conversion for a classic Chevy isn't simply dropping in an engine. It's a complete overhaul involving several key systems. You'll need to address engine mounts, transmission compatibility, drivetrain modifications, wiring harnesses, fuel systems, and exhaust routing, to name a few. Many kits address some of these areas, but a degree of fabrication and mechanical expertise is almost always required.
Finding the Right Cummins Engine
The choice of Cummins engine is crucial. Popular choices often include the 6BT (5.9L) and the 12-valve variants, known for their durability and relatively easy availability. However, remember that even within these families, there are variations in power outputs and configurations. Carefully considering your budget and desired performance is essential.
Where Can I Find a 73-87 Chevy Cummins Conversion Kit?
Several companies specialize in providing kits and components for diesel swaps. These kits often include engine mounts, adapter plates for the transmission, and potentially other necessary parts. However, remember that the comprehensiveness of these kits varies greatly. Some offer a more complete solution, while others focus on key components leaving more custom work to the builder. Thorough research on the reputation and completeness of the kit is paramount before purchasing.
What Transmission Works Best with a Cummins in a 73-87 Chevy?
This depends heavily on the specific Cummins engine you've chosen and your desired performance characteristics. Many conversions utilize a variety of transmissions, including manual transmissions such as the NV4500, or automatic options like the 47RE or 48RE, often requiring custom adapter plates for proper fitment. Each option presents trade-offs in terms of cost, strength, and ease of installation. Careful planning and research are necessary to select the appropriate transmission.
How Much Does a 73-87 Chevy Cummins Conversion Cost?
The total cost of a Cummins conversion is highly variable and depends significantly on several factors. These include the cost of the Cummins engine itself, the chosen transmission, the completeness of any conversion kit purchased, the level of custom fabrication required, labor costs (if hiring a mechanic), and any unexpected issues that arise during the installation process. Budgeting conservatively and factoring in potential unforeseen expenses is crucial for a successful conversion.
What Are the Challenges of a 73-87 Chevy Cummins Conversion?
This conversion presents several significant challenges:
- Fabrication: A considerable amount of custom fabrication is likely needed to integrate the Cummins into the Chevy's chassis.
- Wiring: The electrical systems of the engine and the truck need careful integration.
- Fuel System: The Cummins' fuel system may require modifications or replacement to be compatible with the truck.
- Exhaust: Routing the exhaust system can be tricky, especially when aiming for optimal performance and minimizing noise.
- Cooling System: The increased heat output of a diesel engine may require upgrading the truck's existing cooling system.
Is a 73-87 Chevy Cummins Conversion Worth It?
The “worth it” factor depends entirely on your priorities and resources. If you're seeking a powerful, reliable, and unique classic truck, a Cummins conversion might be a rewarding project. However, the project requires significant mechanical skills, time, and financial investment. Weigh these factors carefully before embarking on this ambitious undertaking. The resulting truck, however, will undoubtedly be a testament to your dedication and skill.
This detailed guide provides a starting point for researching and planning a 73-87 Chevy Cummins conversion. Remember to always prioritize safety and consult with experienced mechanics throughout the process. The journey is challenging, but the result—a powerful and unique classic truck—can be incredibly satisfying.
