Rear Suspension for 1963-72 Chevy Truck (formerly Rear Suspension Package)
Classic Performance now offers rear suspension components for the 1963-72 Chevy Truck. Available as a complete kit or purchased separately, these parts offer a wide range of benefits and a clean custom look. Added exhaust clearance, increased ground clearance, corrected pinion angle, increased driveline clearance, additional torsional rigidity and strength are just a few of the features. CPP’s tubular trailing arms are manufactured with a laser cut and formed spring platform fabricated to a CNC bent heavy wall 2” DOM tube body. The bushings are made of a “NEW” patented D-Spec heat resistant, self-lubricating material that offers long life and a remarkably quiet, comfortable ride.

The complete kit was designed with lowered trucks in mind, correcting the pinion angle that is affected with lowered coil and air springs. The crossmember will bolt into the original location and works with factory trailing arms. This will correct pinion angle associated with a lowered truck and offer 3” by 5” exhaust openings. The Trailing Arms will bolt up as a direct replacement for the original trailing arms and can be used with the original crossmember, rear axle and coil springs.

Package includes trailing arms, crossmember, C-notches, shock relocation kit, deluxe trac bar, lowering blocks, lowered shocks, axle perches, U-bolts, coil springs, and spring retainers (options include billet carrier bearing and weld-on axle perches). Works with one- or two-piece drive shafts

New!!! 63-72 GM C-10 Trailing Arm & Crossmember StrongArm Kit

63-72 GM rear trailing Arm

Arguably by most Chevrolet enthusiasts, the 63-72 C-10’s were some of the best looking trucks that were ever produced by the General. Add sexy body lines with a decently designed original suspension and you have yourself a winner! In fact the rear suspensions on these trucks lent themselves so well to the performance arena that every NASCAR running around the track is suspended by a nearly identical trailing arm suspension system! The C-10 was one of the few exceptions that we were able to develop off of the original equipment without taking drastic measures and completely changing the design and function to improve it. We knew the suspension design was capable of good results; we only needed to focus on improving the design and product specifically for a lowered, air-suspended application.
The first thing that had to be done was to design a set of bolt on C-notches for the truck. The criteria for these new notches was that first and foremost, they would allow enough travel to get the truck as close to the ground as you could possible get one without cutting through the bed floor. I do not know of to many owners of these trucks that is willing to sacrifice cutting up a good bed floor. Now that we have significantly changed the ride height, we had to correct the pinion angle and panhard bar geometry so that the rear axle would travel to its limits with minimal lateral movement and so we could get the pinion angle correct to eliminate vibrations. For the pinion angle, we had to engineer a new bracket attached to the tubular trailing arm to put the pinion angle within spec. The panhard bar posed a little different problem. The mounting of the panhard bar needed to be completely changed and the original axle mount was way out to lunch…. so we designed a billet aluminum bracket, which now bolts to the GM 12-bolt rear end and puts the par within its proper operating parameters. Taking a C-10 this low and not correcting the panhard bar attachment points alone can cause excessive lateral movement and make the truck an ill-handling road-wanderer.
The next problem builders of these trucks typically encounter is exhaust clearance issues. The factory trailing arm crossmember does not allow enough clearance to clear any kind of sizable exhaust so that would require you to either build your own crossmember or run the exhaust under it…. It will work… but it is not clean enough in our book so our crossmember provides enough room for you to run it through bars. However…. If your crossmember is already smoothed, painted, pretty and you don’t want to put our new tubular crossmember in, you can use the factory crossmember.Another design criteria is strength! Obviously we do not like to warranty parts and more importantly we do not want our customers to be down or have any problems. All of our welded assemblies are jig assembled and hand MIG welded by certified welders for consistency and strength. All of our brackets are laser cut and CNC bent for exact reproduction of the original hand-fit prototype pieces to ensure a precise fitment every time!

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