The iconic square-body Chevrolet trucks, often referred to as OBS (Old Body Style) trucks, from the 1988-1998 model years, have a loyal following. Their ruggedness and timeless design make them perfect candidates for modern performance upgrades. One of the most popular modifications is swapping out the original engine for a powerful and efficient LS-series engine from General Motors. This guide will delve into everything you need to know about OBS Chevy LS swap kits, covering the process, considerations, and frequently asked questions.
What is an OBS Chevy LS Swap Kit?
An OBS Chevy LS swap kit is a collection of parts designed to simplify the process of installing a GM LS-series engine into an older Chevrolet truck. These kits typically include crucial components like motor mounts, transmission adapters, wiring harnesses, and sometimes even accessories like exhaust manifolds or headers. The specific components included vary widely depending on the manufacturer and the specific needs of the conversion. Some kits are more comprehensive than others, offering a near “plug-and-play” experience, while others require more fabrication and customization.
What are the benefits of an LS swap?
The popularity of LS swaps stems from several key advantages:
- Performance: LS engines offer significant power and torque increases over the original small-block Chevy engines found in OBS trucks. They are known for their reliability and relatively high horsepower-to-dollar ratio.
- Efficiency: Modern LS engines generally boast improved fuel economy compared to their predecessors.
- Availability: The abundance of used LS engines and parts makes them relatively affordable. You can find everything from complete crate engines to individual components at various price points.
- Simplicity (with a kit): LS swap kits streamline the installation process, reducing the time and expertise needed for the conversion.
What components are typically included in an LS swap kit?
While the exact contents vary between brands and kits, common components include:
- Engine Mounts: These are specifically designed to securely position the LS engine in the OBS truck's engine bay.
- Transmission Adapter: This allows you to mate the LS engine to your existing transmission or a compatible alternative.
- Wiring Harness: This simplifies the electrical connection between the LS engine and the truck's existing electrical system. Some kits offer a complete harness, others may require some custom wiring.
- Accessories (sometimes): Some kits may include components like exhaust manifolds, oil pans, or other accessories to make the installation smoother.
What are the different types of LS swap kits?
Kits vary in completeness and price. You'll find options ranging from basic kits that include just the essential components to more comprehensive kits that include nearly everything you'll need. Some kits are specifically designed for certain LS engines (e.g., LS1, LS2, LS3), while others are more adaptable. Research carefully to find the kit that best matches your engine choice and your mechanical abilities.
How much does an OBS Chevy LS swap kit cost?
The cost of an LS swap kit can vary significantly. Basic kits might start around $500, while more complete kits can cost upwards of $2000 or more. Remember that the cost of the kit is just one part of the overall project; you’ll also need to budget for the engine itself, any necessary transmission modifications, and labor if you're not doing the installation yourself.
What tools and skills are required for an LS swap?
Completing an LS swap is a significant undertaking, requiring mechanical aptitude and a well-equipped workspace. You'll need a comprehensive set of tools, including wrenches, sockets, torque wrenches, and possibly specialized tools for engine removal and installation. Welding and fabrication skills might also be necessary depending on the kit and any custom modifications you might undertake.
Can I install an LS swap kit myself?
While many enthusiasts successfully complete LS swaps independently, it’s a challenging project. If you lack extensive mechanical experience, it’s highly recommended to seek professional assistance. Improper installation can lead to serious mechanical issues.
Where can I buy an OBS Chevy LS swap kit?
Several reputable companies specialize in manufacturing and distributing LS swap kits. Research various brands, read customer reviews, and compare prices before making a purchase.
This guide provides a comprehensive overview of OBS Chevy LS swap kits. Remember that this is a complex project, requiring careful planning, preparation, and the right tools. Always consult a professional mechanic if you're unsure about any aspect of the process.
