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Part 1: Assembling AME’s New ’67-72 C10 “IRS” Chassis
Art Morrison Enterprises C10 chassis w/ IRS
1. Art Morrison (AME) chassis will have the basic suspension components mounted when the chassis arrives.
BY Chadly JohnsonPhotography BY THE AUTHOR

rt Morrison Enterprises (AME) has a brand-new C10 chassis offering, and this is the first one out the door with the IRS upgrade. Let’s take a closer look as the crew at MetalWorks Classic Auto Restoration in Eugene, Oregon, assembles AME’s number one into a roller!

An aftermarket chassis swap can transform your rough-riding ’67-72 C10 into a real joy to drive. Improved ride quality, superior handling, and an aggressive stance are just a few of the improvements your truck will receive. An updated chassis will not only fully enhance your driving performance, but also its durability, dependability, and even resale value.

So, you purchased an AME C10 chassis with an IRS upgrade, congrats, but now what? You might be wondering if the process of tearing the chassis down, getting it coated, and putting it all back together is something you can tackle yourself or should you trust the work to professionals? In this tech feature we give you an overview of the process involved and point out some of the key features of this new design by AME as it’s being assembled by the team at MetalWorks.
Table of chassis hardware
2. Check to make sure you have all the necessary components to assemble your chassis.
AME brake lines
3. AME has pre-bent brake lines to fit their GT Sport chassis. The C10 chassis also includes a -6 fuel line.
Brake lines mocked up onto bare chassis
4. The stainless steel line kit for this chassis was the first prototype. Because of this, we opted to mock them up by taping lines in place to ensure proper fitment.
Drilling holes into chassis for brake line mounts
5. Once all the lines are marked, we drill and tap the frame for the brake and fuel line mounts.
Electronic E-Stopp mounted to chassis
6. The stainless line kit and any additional hardware, such as this electronic E-Stopp, should be mounted before coating to prevent damage to the finish.
Removal of front suspension components
7. Remove front suspension components to prepare for coating.
Bagged and labelled chassis fasteners
8. Make sure to bag and mark fasteners that are removed from the chassis.
New IRS control arm mounts
9. You will notice the IRS suspension will have spacers in the control arm mounts. These spacers should be bagged and marked to ensure that they are re-installed in the correct location.
Removal of axle shaft and spindle
10. Remove the axle shaft and spindle as one unit.
Individual IRS components
11. Components removed from the IRS in preparation for coating.
Installation of offset washers for pinion
12. The IRS will come with various offset washers to allow for pinion angle adjustment.
Removing IRS cradle
13. Here we see the IRS cradle being removed. You will notice we add locator rings on the cradle mounts to help locate the cradle when re-installing.
Freshly coated chassis and components
14. Chassis and suspension components coated and ready for reassembly.
Initial installation of brake lines
15. Begin reassembly by installing the brake and fuel lines.
Repositioning IRS cradle for installation
16. Positioning the IRS cradle for installation.
Temporary chassis nuts
17. The chassis is shipped with temporary nuts installed. The correct nuts will be used when assembling after coating.
Securing IRS with torque fastener
18. Torque fasteners; AME provides a torque specification sheet for all fasteners.
Strange Dana 60 centersection
19. Using a lift table will help position the Strange Dana 60 centersection.
Rear suspension alignment washers
20. The IRS will have concentric washers for aligning the rear suspension.
Axle and spline assembly
21. Axle and spline assembly ready to be reinstalled.
Axle shaft mounted to centersection
22. Mounting the axle shaft to the centersection.
Tightening axle bolts
23. Have an assistant hold the axle while tightening axle bolts to the centersection.
Installing control arms
24. Install the control arms.
Installing coilovers
25. Install the coilovers. You will notice the reservoir is on the bottom. This is done for fitment and will not affect the shock performance.
Freshly coated control arm being reassembled
26. Front control arm bushing being reassembled after coating.
Freshly coated ball joints
27. Reinstall the ball joints after coating.
Installing ball joint boots
28. A piece of tubing is used to install the ball joint boots.
Assembling front suspension
29. Begin assembly of the front suspension.
Installing front coilovers
30. Install the front coilovers.
Wilwood C10 spindle
31. AME uses a Wilwood C10 truck spindle on their chassis.
Unbolted steering arm making space for ball joint mount nut
32. Un-bolt the steering arm to provide space to torque the ball joint mount nut.
Installing upper control arm
33. Install the upper control arm; make sure spacers are in the correct position.
Completed front suspension assembly
34. Torque and make all fasteners.
Art Morrison Enterprises
(800) 929-7188
MetalWorks Classic Auto Restoration