Swapping a Cummins engine into a classic 73-87 Chevy is a popular project among truck enthusiasts. The combination of a robust Cummins diesel and the iconic body style of these Chevy trucks creates a powerful and visually appealing vehicle. However, a successful conversion requires careful planning and the right parts. This guide will delve into the intricacies 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 isn't a simple bolt-on affair. It's a significant undertaking requiring mechanical expertise, specialized tools, and a considerable investment of time and money. The process involves sourcing the Cummins engine (various models are suitable, each with its own considerations), transmission, and associated components. Beyond the engine itself, you'll need an appropriate engine mount kit, custom driveshaft, modified or custom wiring harness, fuel system modifications, and potentially body modifications to accommodate the larger engine. You'll also need to address cooling system requirements, exhaust routing, and potentially upgrading your suspension to handle the increased weight and power.
What are the Different Cummins Engine Options for a 73-87 Chevy?
The choice of Cummins engine greatly impacts the complexity and cost of the conversion. Popular choices include the 6BT (5.9L) and the 12-valve engines, known for their reliability and power. However, the specific year and configuration of the Cummins engine you choose will dictate the necessary adaptations. Newer, higher horsepower engines will naturally require more extensive modifications. Consider factors like fuel injection, turbocharging, and overall engine dimensions when selecting your engine. This research should be done well in advance to ensure parts compatibility.
Where Can I Find a 73-87 Chevy Cummins Conversion Kit?
There isn't a single "kit" that comprehensively covers all aspects of the conversion. Instead, you'll source components from multiple suppliers. Companies specializing in diesel performance parts often carry many of the necessary components such as engine mounts, adapters, and various hardware. You might find some pre-assembled components, like engine mounts or specific fuel system parts, designed for this conversion from various vendors. Expect to spend a significant amount of time researching and sourcing parts from different suppliers.
What Transmission Should I Use with a Cummins in a 73-87 Chevy?
The transmission choice is crucial. A transmission capable of handling the torque output of the Cummins engine is essential. Common choices include various manual transmissions, often sourced from other trucks with similar engines or adapted for the conversion. Automatic transmissions might require custom adapters or a complete swap with a heavy-duty unit. The selected transmission must properly interface with the Cummins engine's output shaft and the Chevy's existing drivetrain components (or those newly acquired for the conversion).
How Much Does a 73-87 Chevy Cummins Conversion Cost?
The cost varies drastically depending on several factors: the engine and transmission you choose, the level of custom fabrication required, the quality of parts used, and your own labor contribution. Expect a substantial investment, ranging from several thousand dollars for a simpler conversion with some used parts to tens of thousands of dollars for a fully customized, high-performance build. Factor in the cost of professional installation if you lack the necessary mechanical skills.
What are the Legal Considerations for a Cummins Engine Swap?
Before starting the conversion, familiarize yourself with your local vehicle registration and emissions regulations. Depending on your area, you might need to obtain specific permits or inspections to ensure compliance after the engine swap. These requirements can vary widely by region. Consult your local Department of Motor Vehicles (DMV) or equivalent agency for specific guidance.
Conclusion: Planning Your 73-87 Chevy Cummins Conversion
Converting your classic Chevy to a Cummins diesel is an ambitious project requiring thorough planning, mechanical skill, and a significant investment. By meticulously researching each component and carefully selecting the right parts, you can successfully create a powerful and unique truck. Remember to prioritize safety throughout the conversion process. This detailed guide aims to provide a solid foundation for your planning phase. Good luck!
