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Single-Piece 4” x 2” g-Machine Crossmember
Bent-tube, billet-component crossmembers are a completely closed rigid structure with greater strength, and resistance to bending and twisting
than other designs. Formed from a single-piece of 4 x  x .0” steel tubing, large radius mandrel bends are placed at each end to distribute loads
throughout the crossmember, eliminating fatigue points at critical areas. Slots for the billet-mount tabs are machined in a large horizontal machin-
ing center with dedicated fixturing to guarantee correct component geometry, ensuring the suspension moves as designed.

Interlocking Slot-Tab Technology

Self-fixturing female slots used with machined male tabs, provide an interlocking assembly method which enables A-arm, rack and pinion, and shock mounts to be accurately positioned in all axes. This guarantees
the suspension will perform as designed. Non-interlocking designs are not nearly as accurate after welding. Superior spray- arc welding process produces the best weld penetration with excellent appearance.
Billet Steel A-arm Mounts with Pivot Pins Billet-steel, CNC-machining allows us to create A-arm mounts with specific areas of increased thickness for added strength; not possible with other designs. Unlike slot or eccentric mounted A-arms,
Chassisworks exclusive fixed-axis pivot-pin design eliminates the
possibility of shifting pivot shafts, provides greater shear strength
and increases bending resistance. Threaded bosses at each end of
the mount enable use of set screws to lock A-arm pivot-pins into
position. Using slot-tab technology, upper A-arm billet-mounts
snap and weld into place providing anti-dive geometry and cap-
ping the open ends of the 4 x ” crossmember to better distribute
forces, decrease flex throughout the structure, and provide a solid
location for the upper shock mount. The lower A-arm mount is a
single-piece component passing directly through the crossmem-
ber and supported by the antiroll bar mounting plate to distribute
bending forces throughout the crossmember. This increases rigid-
ity and geometry accuracy of the control arm for more predictable
handling.

One-Piece Clevis Shock Mount

Our g-Machine upper shock mounthas a -5/6”-wide, formed clevis which accepts /” mounting hardware and provides adequate clearance for use with VariShock coil-overs or Shock- WaveTM air suspension. Our one-piece design with integrated gusset across the top, and sides extending downward, bridge the billet upper A-arm mount to the 4 x ” crossmember. This provides a larger, more stable mount base, with better appearance than welded designs, and eliminates bending fatigue possible with common sheet metal or tubing mounted designs of other manufacturers.

Anit-Roll Bar
Mount PlateSingle-Piece
Billet Lower
A-Arm Mount
Billet Upper
A-Arm Mount
Locating features are machined into each crossmember to enable self-positioning of billet components. Billet rack-and-pinion mount inserts into
machined slot on crossmember.
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Billet Rack Mounts and Clamps

Steel billet rack mounts, using dual slot-tab technology, form an interlocking bridge between the  x 4 cross member and billet aluminum rack brackets. The angled mount fixture welds to 4 x ” cross member, attaching to rack body at widest points, while positioning rack above bottom of cross member, safe from road hazards. Billet aluminum rack clamps attach into interlocking grooves in the rack gearbox, preventing flex in hard cornering unlike rubber-mounted designs. This also allows rotation of input shaft to aid steering shaft installation around engine obstacles and exhaust system.

Subframe Installation Features
Detailed Installation Guide

Included with each g-Machine Camaro subframe is a very detailed 04-page installation guide. The guide features over 300 individual photos completely illustrating the installation process at each and every step. Beginning with clip assembly, and then continuing on with removal of factory components and final installation, our comprehensive guide makes installation and setup an uncomplicated task.

Alignment Holes

To simplify subframe alignment in relation to the body, the OEM alignment holes have been duplicated on the g-Machine sub frame. Note that not all replacement subframes on the market have this important feature. A pair of CNC-machined alignment pins is supplied to make subframe installation
simple, and highly accurate.

Body Bushings

Body bushing kits are available for g-Machine or stock sub- framed 967-69 Camaro/Firebirds and 968-79 Novas; in urethane (P/N 68) or billet aluminum (P/N 686). Urethane bushings have adequate rigidity for performance street cars, but significantly dampen noise and vibration transferred into the passenger area. Billet aluminum bushings are more suitable for road race or drag race vehicles where maximum rigidity is
required, and noise and vibration are less of a concern.

Part Number Description Price
686 Subframe to Body Bushings, Billet Aluminum, ’67-8 Camaro/Firebird,
and ’68-74 Nova (set of 6) $65.00
68 Subframe to Body Bushings, Black Urethane, ’67-8 Camaro/Firebird,
and ’68-74 Nova (set of 6) 78.00 Billet Aluminum Body Bushing (6816)
Alignment Pins Included Alignment Hole Urethane Body Bushing Pinion Rotated Up Pinion Rotated DownSlot-Tab Technology, Interlocking Joint
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Engine Mount Options

Multiple engine-mount bracket options enable true bolt-in installation for nearly any drivetrain. Standard side mount brackets for small-block, big-block, and LS-style V8 engines; as well as small- or big-block motor plates, and mid plates for more serious performance applications are available. To positively locate the engine, driver’s side motor plates, mid plates, and side-mount frame brackets have correct- sized bolt holes. Passenger’s side mounts use slightly over-sized slots to facilitate installations with minor
chassis variances. Subframes ship with all mounts factory welded and ready for installation.

Frame Engine Mount Options Price

No Engine Brackets $0.00
Side-Engine Brackets Only 0.00
Side-Engine and Mid Plate Brackets 50.00
Small-Block Motor Plate and Mid Plate Brackets 50.00
Big-Block Motor Plate and Mid Plate Brackets 50.00
Side-Engine, Small-Block Motor Plate, and Mid Plate Brackets 5.00
Side-Engine, Big-Block Motor Plate, and Mid Plate Brackets 5.00
Small- and Big-Block Motor Plate, and Mid Plate Brackets 00.00

Billet Side Motor Mounts Part Number Description Price

6007- Billet Aluminum, Chevrolet Side Mount, LS Series, Matte Finish $95.00
6007- Billet Aluminum, Chevrolet Side Mount, LS Series, Polished Finish 345.00
6055- Billet Aluminum, Chevrolet Side Mount, SB, BB, V6, Matte Finish 66.00
6055- Billet Aluminum, Chevrolet Side Mount, SB, BB, V6, Polished Finish 06.00
6055- 6007-
Motor Plate Bracket
Side Engine Bracket
Mid Plate Bracket
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Motor Plates

Part Number Description Price
6063 Bolt-In Motor Plate, Small Block V8, ‘67-69 Camaro, ‘68-7 Nova $65.00
6064 Bolt-In Motor Plate, Big Block V8, ‘67-69 Camaro, ‘68-7 Nova 65.00
6063 6064 Mid Plates
Part Number Description Price

6065 Bolt-In Mid Plate, Automatic, Camaro 967-69, Nova 968-7 (g-Machine subframe only) $76.00

6066 Bolt-In Mid Plate, Lakewood, Camaro 967-69, Nova 968-7 (g-Machine subframe only) 07.00

607 Bolt-In Mid Plate, Automatic, Firebird 967-69 (g-Machine subframe only, Pontiac V8) 97.00

607 Bolt-In Mid Plate, Lakewood, Firebird 967-69 (g-Machine subframe only, Pontiac V8) 8.00 6065 6066 607 607
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Transmission Crossmember Mount

The transmission crossmember mounts are bent to form bracing gussets welded along the inside wall of the frame rail. The bracket overlaps the entire top panel of the subframe, increasing total material thickness. Two
sets of mounting holes at the bracket allow use of the same g-Machine tubular transmission crossmember with V8 engine blocks, or modern LS engines. Mounting hardware is inserted from the bottom side of the bracket and threaded directly into the weld nuts of the crossmember. This eliminates the need for hardware access space above the mounts and allows the crossmember to be positioned tighter against the body into the channel in the stock floor to obtain maximum exhaust clearance. Direct-fit
transmission crossmembers are available for Turbo 350, Turbo 400, Powerglide, 700R4, 00-4R, 4L60, 4L65E, Muncie 4-speed, Richmond 5- or 6-speed, and many Tremec 5- or 6-speed transmissions.
6067 - 4-Speed, Powerglide, Turbo 350 6068 - 700R, Tremec, Richmond 5-speed, 460L
6069 - Turbo 400, 00-4R, 4L65E 6070 - Richmond 6-speed ROD

Transmission Crossmembers
Part Number Description Position1 Price 6067 4-Speed / Powerglide / Turbo 350 Transmission Crossmember 0.55” $65.00
6068 700R / Tremec / Richmond 5-Speed / 4L60 Transmission Crossmember .95” 76.00
6069 Turbo 400 / 00-4R / 4L65E Transmission Crossmember 6.848” 86.00
6070 Richmond 6-Speed ROD Transmission Crossmember 4.375” 07.00
Footnote:
 Position of mount is the measured distance from back surface of engine block to center of transmission mounting holes.
Use length shown to determine usable crossmember for transmissions not listed. (Must verify pan clearance.)
 4L65E transmission can be used with LS-series engine only. 6069 crossmember must be mounted in rearmost holes of sub frame bracket.
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End of Part 4