Complete Guide to 1967 AMC Marlin Suspension Parts: Restoration and Upgrade Options

The 1967 AMC Marlin is a classic fastback that deserves proper road manners. Whether you are restoring to factory spec or upgrading for modern driving, choosing the right suspension parts is critical. This guide covers the essential components for the front and rear suspension, steering, and what to look for when buying.

Front Suspension Components

The 1967 Marlin uses an independent front suspension with coil springs, upper and lower control arms, and a stabilizer bar. Key parts include:

Coil Springs

Front coil springs support the vehicle weight and affect ride height. Factory springs had a specific rate for the Marlin’s heavy front end. Over time, springs sag. Replacement options include OEM-style springs from brands like Moog or variable-rate springs for a slightly firmer ride. If you plan to add a heavier engine (e.g., AMC 390), choose springs with a higher load rating.

Upper and Lower Control Arms

These arms connect the wheel hub to the frame. Original arms are steel and may have worn bushings or ball joints. Replace with new arms (or rebuild using new bushings and ball joints). For improved handling, consider tubular upper control arms that allow more caster adjustment. Lower arms are less common to upgrade; focus on quality replacement bushings.

Ball Joints and Bushings

Ball joints wear over time, causing clunks and imprecise steering. Use only greaseable, factory-style ball joints. For bushings, polyurethane offers better control than rubber but transmits more vibration. Rubber is fine for a stock restoration. Brands like Moog or Proforged are reliable.

Stabilizer Bar (Sway Bar)

The front sway bar reduces body roll. Stock is about 1 inch diameter. Upgrading to a thicker bar (1-1/8 inch) improves cornering without harshness. Don’t forget the bushings and end links – they crack and cause noise.

Shock Absorbers

Original shocks were hydraulic. For a smoother ride, use gas-charged shocks like Bilstein or KYB. Adjustable shocks let you tune for comfort or performance. Monroe also sells direct replacements.

Rear Suspension Parts

The rear uses a solid axle with leaf springs. Common wear points:

Leaf Springs

The rear leaf springs sag over time, lowering the back and causing bottoming. Replace with new OEM-spec springs from Eaton Detroit Spring or Alcan. For a slight lift (and better handling), consider a multi-leaf spring with an extra leaf. Always replace both sides.

Shackles and Bushings

The rear shackles (metal links attaching springs to frame) can corrode and bind. Use new shackles with polyurethane bushings for less friction. This improves suspension movement.

U-Bolts and Plates

When replacing springs, you’ll need new U-bolts and spring plates. These are cheap and critical for safety. Torque to spec (around 40-50 ft-lbs).

Shock Absorbers

Rear shocks are similar to front but with different valving. Match brand and type to front. If you tow or carry heavy loads, consider heavy-duty shocks.

Rear Sway Bar (Optional)

The 1967 Marlin did not come with a rear sway bar, but aftermarket kits are available. Adding one reduces understeer and makes the car flatter in corners. Installation requires welding brackets to the axle housing.

Steering Components

Steering Box

The Marlin uses a manual recirculating ball steering box. If loose, adjust the worm gear or replace the box. For easier steering, upgrade to a power steering conversion kit (available from firms like CPP). Match the pitman arm to the box.

Tie Rod Ends and Drag Link

Worn tie rod ends cause wandering and uneven tire wear. Replace with OEM-style or Moog. The center drag link also wears; consider a heavy-duty replacement.

Steering Column and U-Joints

If you convert to power steering, you may need a different steering coupler. Check u-joints at the rag joint for slop. Replace with a solid u-joint for a more direct feel.

Buying Guide for 1967 AMC Marlin Suspension Parts

OEM vs Aftermarket

For a concours restoration, use NOS (New Old Stock) or high-quality reproduction parts. Aftermarket parts are fine for driver-quality cars and often improve performance. However, avoid cheap no-name brands that may fail prematurely.

Where to Find Parts

Specialty AMC parts suppliers like Kennedy American Parts, American Parts Depot, or AMC Parts.com are reliable. For general parts, RockAuto carries many items. Do not rely on generic chain parts that may not fit (e.g., control arms differed from the Chevrolet Nova).

Compatibility with Other AMC Models

The 1967 Marlin shares suspension architecture with the 1967-69 Ambassador and Rebel. Many front suspension parts interchange, but verify. Rear leaf springs are Marlin-specific due to spring length and rate. Use part numbers for exact fit.

Budget and Labor Costs

Complete front suspension rebuild kits cost $300–$600. Rear springs about $300 per pair. Steering box $200–$400. If paying a shop, expect $1,500–$3,000 labor for all. Doing it yourself saves money but requires a spring compressor and alignment afterward.

Restoration Tips

• Use penetrating oil on bolts weeks before disassembly.
• Replace all rubber bushings at once.
• After installation, get a professional alignment. Specifications: caster +1/2° to +1-1/2°, camber 0° to +1/2°, toe 1/8" to 3/16" inward.
• Consider adding a front anti-sway bar if your car didn’t have one (all 1967 Marlins had one, but some early models may be missing).

Practical Recommendation

For a well-rounded 1967 AMC Marlin that drives like new, focus on these priorities:

1. Replace all bushings and ball joints – Polyurethane for better control, rubber for originality. Moog is a safe brand.
2. New leaf springs from Eaton Detroit Spring with the correct arch for your car (standard or heavy duty).
3. Gas shocks (e.g., Bilstein B6) for improved body control without a harsh ride.
4. Rebuild or replace the steering box if there is more than 2 inches of steering wheel play. Add power steering if you drive frequently.
5. Add a rear sway bar only if you want sharper handling; otherwise skip.

By addressing these items, your Marlin will handle well on modern roads while keeping its classic character. Always use torque specs from the service manual and inspect for rusted or weak frame areas before proceeding. Enjoy the restoration – a well-suspended AMC is a joy to drive.