GSI Machine and Fabrication
55-59 Truck Coilover Front Clip & Backhalf
55-59 Truck Coilover Front Clip & Backhalf
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55-59 Truck Coilover Front Clip & Backhalf - #110-8100-C
This complete front and rear coilover suspension package replaces the original front and rear chassis sections on 1955-1959 Chevy and GMC trucks with a modern, fully engineered coilover system designed to aggressively lower stance, improve handling, and enhance drivability. This product bundles both the front clip and rear back half into one purchase for a matched suspension solution.
Both kits are engineered and manufactured at our facility in Chandler, Arizona, using Amada laser-cut and CNC-formed ASTM A1011 components to ensure consistent fitment and strength.
Front Suspension Overview
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Full front clip suspension replacement requires removal of the stock front chassis
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Uses 73-87 half-ton Chevy spindles for correct installation
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Upgraded to power steering rack & pinion
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Works with stock clamshell motor mounts for GM 350, with LS engine compatibility using an adapter plate (Sold Separately)
Rear Suspension Overview
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Rear back half suspension replacement requires removal of stock rear chassis
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Inboard parallel 4-link suspension for 15” wide wheel clearance
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Billet Watts Link for lateral axle control
- Adjustable coilover mounting allows 4"-8" frame height
Fitment
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1955-1959 Chevy & GMC Trucks
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Works with clamshell-style motor mounts with a GM 350
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Supports Small Block, Big Block, LS, & LT4/LT5 engines
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Motor mounts & rubber clamshells sold separately
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A low-profile oil pan required for all engine configurations
- Holley LS P/N: 302-2
- Speed Engineering P/N: 26-1042
- Recommended wheel specs:
- 20" x 9" with 6" Backspace
- 22" x 9" with 6" Backspace
- Maximum wheel specs:
- 24" x 9 or 10" with 6" Backspace (Max)
Spindle options:
- CPP Stock Spindles - Factory height spindle with the spindle pin located at the bottom, maintaining original suspension geometry and ride height.
- CPP 2.5" Drop Spindles - Lowers the vehicle 2.5" by relocating the spindle pin higher while retaining full suspension travel and stock 11"–12" brake kits.
- CPP 2.5" Modular Drop Spindles - Lowers the vehicle 2.5" using a modular hub design, offering increased clearance for aftermarket 13"–14" brake kits.
What’s Included (Front Clip)
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(1) Main Crossmember & Frame Rails with Logo
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(2) Engine Perches
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(2) Upper Control Arms
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(2) Lower Control Arms
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(2) Upper Ball Joints
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(2) Lower Ball Joints
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(1) Rack & Pinion with Aluminum Bushing Set
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(2) Coilover Shocks
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(2) Tie Rod Adapters
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(2) CPP Spindles (Stock, 2.5" Drop, Or Modular 2.5" Drop)
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(1) Hardware Bag & Instructions
What’s Included (Backhalf)
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(1) Welded Rear Frame Rails
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(1) Bridge Assembly
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(2) Billet Watt’s Links (With Jam Nuts, Heim's & Misaligns)
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(1) Watt's Link Center Pivot
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(1) Watt's Link Mount Bar
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(2) Frame Reinforcement Plates
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(4) Adjustable 4-Link Bars
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(8) Rod Ends (With Jam Nuts, Crush Sleeves, Bushings, & Zerk Fittings)
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(2) 4-Link Axle Mounts (x1 Circle, x1 Oval)
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(2) Coilover Shocks
- (1) Hardware Bag & Instructions
Notes
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Kit requires welding and ships on a pallet
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Designed for coilover applications only
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This will convert a long bed to short bed
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Removal of inner fender wells is required
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Power steering hoses and fittings not included
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Steering shafts and U-joints not included
- Rack and pinion is Mustang II style with 3/4-36 spline
California Proposition 65 Warning
Cancer and Reproductive Harm – www.p65warnings.ca.gov
Questions? Contact Us
(480) 940 1806 – Local
1 (877) 951-1890 – Toll Free
SKU: 110-8100-C