Installing a modernized drivetrain in a classic Chevrolet truck can transform the way it drives, but the success of the swap depends on more than choosing the right engine and transmission. The drivetrain also needs a strong, properly positioned mounting foundation.
The CPP 4759ETX-K Straight Axle Small-Block Install Kit brings the major engine and transmission mounting components together in one coordinated package for 1947–59 Chevy trucks. It is designed to help builders position and support a small-block Chevy engine and a compatible GM automatic transmission without having to source every mounting component separately.
A Coordinated Drivetrain Mounting Package
An engine swap involves several components that must work together. The engine crossmember establishes the mounting foundation for the engine, while the transmission crossmember supports the rear of the drivetrain and helps maintain the correct operating position. The CPP 4759ETX-K combines these components with the required rubber mounting pads, giving builders a more complete starting point for their project.
The kit includes:
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One CPP CP4810 engine crossmember
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One CPP CP9424 transmission crossmember
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Two CPP 2142 small-block Chevy rubber motor mounts
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One CPP 9425 GM rubber transmission mount
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Engine perches and installation hardware
The crossmembers feature a durable black finish, and the product is listed as adjustable to help accommodate the installation process.
Designed for 1947–59 Chevy Trucks
Chevrolet trucks built between 1947 and 1959 remain some of the most popular platforms for restoration, restomod and street-truck projects. Their classic styling makes them highly desirable, but the original drivetrain configuration may not provide the power, cruising capability or replacement-parts availability expected from a modernized build.
Installing a small-block Chevy engine is a popular solution. It provides access to a wide selection of engines, accessories and performance components while keeping the truck within the traditional Chevrolet family. The CPP 4759ETX-K is specifically offered as a straight-axle installation package for 1947–59 Chevy trucks, making it suitable for Advance Design and Task Force-era projects that retain this general chassis configuration.
Engine Crossmember and Rubber Motor Mounts
The included engine crossmember spans the frame and creates a mounting point for the engine perches and motor mounts. Its tubular construction provides a clean, compact foundation for positioning the drivetrain within the chassis. Two small-block Chevy rubber motor mounts are supplied with the kit. Rubber mounts help isolate normal engine movement and vibration from the frame, making them a practical choice for street-driven trucks where comfort and dependable operation are priorities.
Using the engine crossmember, perches and mounts as a coordinated package can also simplify the planning process compared with combining unrelated components from several sources.
Transmission Crossmember Included
The transmission crossmember supports the rear of the transmission and helps maintain the drivetrain’s installed position. CPP includes a GM rubber transmission mount pad to provide support while helping isolate normal drivetrain vibration. The 4759ETX-K supports several popular GM automatic transmissions:
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GM TH350
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GM TH400
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GM 700-R4
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GM 4L60E
Why Consider an Overdrive Transmission?
Many classic Chevy trucks are upgraded to improve highway comfort as well as acceleration and reliability. An overdrive transmission can reduce engine speed during steady cruising when it is paired with the appropriate rear-axle ratio, tire diameter and engine combination.
The 700-R4 is a popular hydraulically controlled option, while the electronically controlled 4L60E can be used in builds that incorporate the necessary transmission controller or compatible engine-management system. Builders who prefer a more traditional drivetrain can use the TH350 or TH400, depending on the vehicle’s intended use and power level.
Plan the Complete Drivetrain Before Installation
Although the kit provides the primary mounting components, every classic-truck build should be carefully measured before the crossmembers are permanently attached.
Installers should test-fit the engine and transmission together and verify:
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Firewall and transmission-tunnel clearance
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Oil-pan and front-axle clearance
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Steering-system clearance
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Exhaust and header clearance
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Radiator and cooling-fan space
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Distributor and accessory clearance
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Driveshaft length and operating angles
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Transmission-pan and service access
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Shifter, linkage and cable routing
The final engine position can affect nearly every surrounding system. Taking time to verify the complete layout before drilling, welding or permanently fastening components can prevent costly changes later in the project.
A Practical Starting Point for a Classic Chevy Truck Swap
The CPP 4759ETX-K is a practical solution for builders who want the main engine and transmission mounting components supplied as one package. With an engine crossmember, transmission crossmember, engine perches, two rubber motor mounts, a rubber transmission mount and installation hardware, the kit provides the foundation needed to move a classic Chevy truck drivetrain project forward.
Whether the goal is a dependable weekend cruiser, a highway-friendly restomod or a more powerful street truck, properly mounting the engine and transmission is one of the most important steps in the build.
Shop the CPP 4759ETX-K Install Kit
Get the mounting components needed for your 1947–59 Chevy truck drivetrain project with the CPP 4759ETX-K Straight Axle Small-Block Install Kit.
