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  • Writer's pictureJason Howerton

Upgrading Your Chevy K10: Installing the LSx Swap Crossmember

Updated: Jul 23, 2023

Introduction: Welcome to our blog post, where we'll guide you through the process of installing our 67-72 Chevy K10 LSx Swap Crossmember. This versatile crossmember is designed to replace the factory engine mounting system and crossmember, allowing for a seamless installation of an LSx series engine with the stock truck pan. We're thrilled that you've chosen our product, and we're here to assist you at every step of the way. Let's dive into the installation instructions!

Step 1: Prepare for Installation Before proceeding with the crossmember installation, ensure that you have already removed the engine to be replaced from within the frame rails. Now, let's get started with the installation process!

Step 2: Removing the Factory Crossmember Depending on the age of your truck, the factory engine crossmember may be bolted or riveted in place. If it's bolted, simply reverse the process to remove the crossmember. However, if it's riveted, you have a few options to remove them:

  • Center punch the head and pilot drill through with a 1/8” bit, then use a larger bit to remove the head of the rivet. Finally, use a punch or air hammer to drive out the remaining part of the rivet.

  • Cut an X in the head with a cut-off wheel, then use a chisel or similar tool to remove the head. Finish by using a punch or air hammer to drive out the remaining part of the rivet.

  • Use a torch to melt the head off.

  • Grind the head off with a grinder.

  • Wiggle the rivet out, although this method might take the longest.

Step 3: Installing the New Crossmember With the stock crossmember removed, it's time to install the new LSx Swap Crossmember. Refer to the provided picture and note that the rubber motor mounts should be offset towards the back of the crossmember. To correctly position the crossmember within the C of the frame rails, follow these steps:

a. Place the crossmember at an angle within the C of the frame rails, with the passenger side towards the front and the driver's side towards the rear. b. Using a soft blow hammer, gently tap each side of the crossmember until it is seated within the frame rails and the bolt slots are aligned with the stock crossmember holes.

Step 4: Loosely Bolt the Crossmember in Place Secure the crossmember in place using the provided 3/8 hardware, ensuring you place a washer under the head of the bolt and one under the nut. You may need to use a prying device to flex the rails slightly to align the bolts with the holes.

Step 5: Install the Rubber Mounts The rubber mounts will only fit one way, so install them correctly, and make sure they snugly fit at the top of the mounting holes.

Step 6: Install the Block Mounts on the Engine Before swinging your engine into place, you need to install the block mounts to the engine block. Ensure the outside tab faces towards the front of the engine, and the rear-most bolts are after the rear tab. Use the provided metric bolts for this step, and consider using some blue locktite for added security.

Step 7: Swing the Engine into Place Now it's time to swing your engine into place and align the mounts. Install the 7/16 bolts to secure the engine firmly in its new position.

Additional Tips:

  • For extra clearance during installation, consider removing the exhaust manifolds and coil packs.

  • Pay attention to the passenger side rear coil pack and stud, as you might need to use a bolt instead of the stud depending on your mounting setup.

  • Some firewalls may require clearancing for the coil pack, so keep that in mind during the installation process.

Conclusion: Congratulations! You've successfully installed our 67-72 Chevy K10 LSx Swap Crossmember, paving the way for an efficient and powerful LSx engine upgrade. We hope this blog post has been helpful and that you enjoy your enhanced driving experience. If you have any questions or encounter any issues, don't hesitate to reach out to our support team for assistance. Happy driving!

If you are looking to upgrade the motor mounts that come with the kit, We recommend this kit. (paid link)

Need a engine harness and ECM for you LS swap? We recommend this kit.

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