Porterbuilt 1973-87 C10 Front Dropmember - Level 3 Extreme
The 1973-87 Chevy Pickup Front Dropmember suspension system is designed to replace the factory cross-member and steering system. It is engineered as a modular bolt-in unit that requires no welding.
When combined with a 2.5” drop spindle, 29” tall tire, and Porterbuilt Tubular Control Arms, the Level 3 Front will set the lowest point of the factory frame rails on the ground when fully deflated.
Ride Height - 4"
Deflated Height - Lay Frame
1973-87 Dropmember Level 3 Front Airbag
The Porterbuilt Version 7 Dropmember sets the standard of quality and precision in the C10 suspension market. The Version 7 Dropmember is engineered as a modular, bolt-in unit that requires absolutely no welding or fabrication. The Level 3 Extreme kit allows you to lay frame quickly and easily, with improved suspension geometry and handling.
- Revised suspension geometry for improved performance and ride quality
- Rack and pinion steering for increased steering response
- Proper wheel center-line placement (sets the wheel center-line in the middle of the wheel well opening for a more balanced look)
- Narrowed trac-width (Level 3 narrows the trac-width approx. 1.25” per side)
- Added ground clearance over factory components
When combined with a 2.5” drop spindle, 29” tall tire, and Porterbuilt Tubular Control Arms, the Level 3 Front will set the lowest point of the factory frame rails on the ground when fully deflated. Ride height is approximately 4" off the ground.
The Version 7 Dropmember is ONLY compatible with Porterbuilt Tubular Control Arms.
When running the Level 3 Front, the engine placement is moved forward and up from its factory location.
LS Engine requires the use of an F-Body oil pan. Click here for part #'s: F-Body Oil Pans
Does NOT come powdercoated. All parts come raw.
Designed to be paired with our Dropmember Level 3 Rear.
- Dropmember (Front Crossmember)
- Components - Inner Truss, Upper Hats (Upper Bag Mounts)
- Shock Relocate Brackets
- Grade 8 Hardware
Upgrades & Add-on Items
- Motor Mounts
- Upper & Lower Control Arms (Required)
- Ball Joints
- Rack & Pinion Hardware (Required)
- Steering Rack & Linkage
- Dominator 2600 Airbags
- Transmission Crossmember
- Sway Bar
Options & Upgrades
Porterbuilt Motor Mounts (required)
Porterbuilt motor mounts bolt directly to the block and include all hardware necessary for installation. Available in a variety of configurations:
Small Block Chevy, SBC
Big Block Chevy, BBC
Porterbuilt Tubular Control Arms (required)
Porterbuilt tubular control arms are built using thick-wall DOM tubing and CNC cut 3/16 pickeled plate steel. All bushing pivot tubes and ball joint cups are TIG welded.
Rack & Pinion
Unisteer Rack & Pinion kits have everything you need to switch over to a standard ratio rack & pinion. Available in power or manual. Don't forget to add hoses and steering linkage.
CPP Rack & Pinon kits are a budget friendly solution without sacrificing quality.
Rack & Pinion Hardware (required)
The rack and pinion hardware kit connects the steering rack to the Dropmember and tie rod ends to the spindles. Includes billet rack mount bushings, high-quality rod ends, mis-alignment spacers, and custom machined tie rod adjuster sleeves.
KYB Excel-G gas shocks and struts rely on velocity-sensitive valving to respond to changing road conditions for a smooth, comfortable ride. They feature sintered-iron pistons and guide rods for strength, hard-chrome piston rods for added durability, and seamless cylinders and eyerings that eliminate the typical weak points. Excel-G shocks and struts also have a patented check valve to minimize foaming and aeration and maintain control under tough conditions.
Ridetech HQ Series Shocks - The HQ (handling quality) Series shocks adds rebound adjustment for the driver who wants to tune ride quality AND handling quality to their specific taste. A wide rebound adjustment range allows you to cruise down the road in plush comfort or firm up your suspension for those Saturday morning canyon roads!
Air Lift Dominator D2600 airbag kit includes 2 airbags plus hardware (fittings are not included). The Dominator D2600 features an unprecedented maximum restrained pressure of 600 psi, 9.7″ usable stroke, and a load range of 349-3055 lbs. This bad boy will give you the performance you crave. With more lift, a softer, smoother ride, and the lowest price in the industry, you can’t go wrong with the Dominator D2600!
This 1.25″ OD sway bar is manufactured by Porterbuilt, and is available for factory crossmember and Dropmember equipped trucks. It includes all mounting hardware necessary.
Spindles & Brakes
CPP 2" Modular Drop Spindles - One-piece nodular iron design with pressed in alloy steel axle pin; installs with no modifications; allows early years to update to larger bearing. Lowers your truck 2" without moving the wheels out.
CPP Modular™ Drop Spindle Wheel Kits - Available in 5 or 6 lug, comes with 2" drop spindles, 12" drilled and slotted rotors, and Wilwood D52 calipers.
Wilwood C10 ProSpindle is specifically designed for use with Wilwood's disc brake kits, with a 2.5" drop for a more aggressive stance without affecting steering geometry. Constructed from a a proprietary grade of forged aluminum.
Wilwood Forged Narrow Superlite 6R Big Brake Front Brake Kit (Hub) - Billet forged six-piston calipers with 13" or 14” rotors deliver the ultimate combination for braking power and style. These kits require the use of 18” and larger wheels. Only available for 5 lug applications.
Porterbuilt Transmission Crossmember
Porterbuilt transmission crossmembers are built using thick-wall 1.5" OD tubing and CNC cut 3/16 pickeled plate steel. Includes the necessary grade 8 hardware for installation.
An Energy Suspension transmission mounts is necessary. We recommend one of the two below for GM transmissions:
Energy Suspension 3.1108G GM Transmission Mount
Energy Suspension 3.1158G GM Transmission Mount - Short
We recommend a 2-piece driveshaft for all Level 3 Dropmember kits.
All Dropmember kits require the use of a 30" steering column.