By Bob Ryder, Photography by Bob Ryder
In the past, the custom truck scene has been all about building the best looking ride for the shows. That was then, this is now. Instead of just "Sittin' Pretty" under a shady tree, custom truck enthusiasts want more out of their haulers. The pro-touring and performance trend is invading the custom truck world. After the Goodguys Rod & Custom Association introduced showgoers to their autocross competition a couple of years ago, we have seen truck builders transforming their rides into lateral g-Machines. Now when you peer under the hood, the engine bling has been replaced with serious horsepower components that make a statement. The truck’s lowered stance isn’t just about curbside appeal, but about function meeting form. Things builders are now paying attention to include: acceleration, braking, and cornering.
When lowering your truck, whether it is a static or airbag drop, it is always critical to obtain the correct front and rear suspension geometry. When removing the factory front suspension pickup points and mounting brackets from the factory framerails, it becomes more crucial to obtain the correct pickup points to create accurate toe, caster, camber and Ackerman. The rear suspension is just as critical as the front. The rear axlehousing, third member, pinion gearshaft, and driveshaft must be in line with the transmission and engine crankshaft. The driveshaft universal joints will correct any slight misalignment between the driveline components to the transmission and crankshaft. Also, it is very important that the rearend is in alignment with the front suspension. A linked rearend should be laterally located with a watts-link or panhard bar eliminating any lateral movement while cornering.

1. After removing the '74 Chevy C10 cab, hood, fenders and bed, the frame was stripped of
To guarantee a flawless pneumatic suspension transformation that will improve both the driving and handling performance of a '74 Chevy C10, we contacted KP Components (KP). KP has been a leading aftermarket manufacturer of sport truck suspension for more than a decade. KP's popular bolt-on front DropMember independent front suspension (IFS) and unique bolt-on cantilever four-link, with Watt’s link rear suspension systems have been proven winners in the sport truck world. KP Components’ bolt-on front DropMember air suspension and rear cantilever air suspension are the answer to improve your truck’s driving and handling performance.
The crew at Eightball Customs in Placentia, California, performed the installation of the KP front DropMember, with Layarm lower and upper control arms, 3-inch drop spindles, Slam Specialties convoluted airbags, VariShock shock absorbers. The KP cantilever four-link airbagged rear suspension allowed optimum compression suspension travel by installing the KP bolt-on frame step notch kit. Follow along as Eightball Customs' Martin Lange utilizes his wrenchin' skills to install the KP front and rear airbag suspension systems.
Highs:
- High-quality engineered front and rear suspension systems
- Airbagged suspension allows for ultimate stance
- Improved ride quality
- Improved handling performance
- Simple installation
Lows:
- Drilling many holes
- Removing factory front and rear suspension mounting brackets and suspension pickup points
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2. The KP bolt-on 3-inch DropMember, with 3-inch drop spindles, tubular upper and lower co
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3. Our first step was to cut the frame notches to allow clearance for the KP Components’ r
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4. The main DropMember was held in place while the inner frame support plates were aligned
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5. Martin then used box wrenches to snug up the Grade 8 bolts.
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6. The exterior upper control arm/bag mount bracket was aligned and bolted in place using
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7. At this stage, here’s an elevated overall view of the KP DropMember, inner frame suppor
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8. After mounting the motor mount side brackets to the motor mount perches, the bushings w
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9. The big-block motor mount perch was inserted between the two mounting tabs then secured
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10. After inserting the lower control arm steel sleeve into the DuPont Delrin bushings, th
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11. The Slam Specialties convoluted airbag was wedged between the lower control arm and up
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12. The 3-inch drop spindle was aligned with the lower control arm ball joint then the upp
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13. Martin inserted the KP rack-and-pinion steering rack into the frame notches.
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14. After inserting the aluminum bushings into the pinion housing, the rack was then align
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15. The aluminum tie-rod ends were then secured.
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16. After drilling four holes in the framerails, the upper shock mounting bracket was alig
By Bob Ryder
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