ABC Performance has developed a line of Michigan-made products to help you build your muscle car to today’s standards. From suspension components to smoothie firewall panels, we make products that work for muscle car enthusiasts because we are muscle car enthusiasts. We know our products fit and work like they’re supposed to because we use them too!


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Frame Boxing Kit

The original, open-channel frame under ’64-’72 GM A-bodies has been called a wet noodle for its lack of rigidity. The ABC Performance Frame Boxing Kit for ’64-’72 GM A-bodies provides precise, CNC laser-cut plates to box the mid and rear sections of these open-channel frames, greatly increasing chassis stiffness for improved handling and drag racing launches.

The Frame Boxing Kit makes it possible for owners of ’64-’72 Chevelle, GTO, Lemans, Tempest, Cutlass, 442, GS or Skylark to create a factory-looking boxed frame for a fraction of the cost of having a professional chassis shop do the work. Also check out our new Transmission X-Mbr at the bottom of this page.

Chevrolet ‘64-‘67 A-body

Price: $195

Plus Shipping and Handling


* Shipping Charges May Vary

* Add 6% Sales Tax for Michigan Residents

The ABC Performance Frame Boxing Kit is available in two stages: two-piece center sections or a four-piece kit that will box the center and rear sections of the frame. The 1/8-inch plate is cut using a CNC laser and the rear sections are CNC pressed to follow the form of your original frame. The new frame sections can be MIG welded in place. An optional transmission crossmember that works with an original transmission, as well as most newer manual and automatic transmissions, is also available.

Chevrolet ‘64-‘67 A-body

Price: $145

Plus Shipping and Handling


* Shipping Charges May Vary

* Add 6% Sales Tax for Michigan Residents

Buick, Olds and Pontiac ‘64-‘67 A-body

Price: $195

Plus Shipping and Handling


* Shipping Charges May Vary

* Add 6% Sales Tax for Michigan Residents

Buick, Olds and Pontiac ‘64-‘67 A-body

Price: $145

Plus Shipping and Handling


* Shipping Charges May Vary

* Add 6% Sales Tax for Michigan Residents

Two-piece Frame Boxing Kit (middle section)

Four-piece Frame Boxing Kit (middle and rear sections)

Transmission X-Mbr

When you install our Frame Boxing Kit, you’ll need our tubular Transmission X-Mbr. This installs with weld-on tabs to the inside of the boxed framerail and accepts the transmission mount used on just about all GM transmissions. The Transmission X-Mbr is available with or without an integrated driveshaft loop. Our Transmission X-Mbr is made from DOM  
1 3/4 inch mild steel tubing with 0.125-inch thick wall. You can also upgrade to Chromoly: call for pricing.

Transmission X-Mbr for ‘64-‘72 A-body

Price: $250

Plus Shipping and Handling


Transmission X-Mbr for ‘64-‘72 A-body with driveshaft loop

Price: $365

Plus Shipping and Handling


All ‘68-‘72 A-bodies

Price: $145

Plus Shipping and Handling


* Shipping Charges May Vary

* Add 6% Sales Tax for Michigan Residents

All ‘68-‘72 A-bodies

Price: $195

Plus Shipping and Handling


* Shipping Charges May Vary

* Add 6% Sales Tax for Michigan Residents