Calvert Racing Shackle and Bushing set for some GM cars that have Calvert Split Mono springs installed.
Fits: 1967-1981 Camaro/Firebird, 1968-1978 Nova/Ventura/Omega/Apollo with Calvert Split Mono springs installed.
Replace old worn out shackles with new shackles along with polyurethane bushings for the upper frame as well as the rear spring eye to reduce suspension binds and ensure a long service life. 3-1/4″ center to center. Includes required hardware. 9/16″ bolt.
If you are unsure which part number will best fit your vehicle, please call Calvert Racing at 661-728-9600, Monday – Friday, 8:00am-4:30pm, PST.
$129.00
In Stock
SPRING PERCHES FOR 2.75″ AXLE TUBE
Set of (2) Two Perches. Fully enclosed for added strength, pedestal tabs ensure heat penetration when welded to housing. Perch extends to center line of axle tube for more surface area. Precision laser cut. Requires welding to axle, see graphic for info.
Check out the comparison graphic to see how Calvert’s patented Heavy Duty Perches compare to other manufacturer’s stock perches.
Patented HD Axle Perches. Universal design fits nearly every application. Available to fit the most common axle tube diameters; 2.25″, 2.5″, 2.75″, 3″, 3.25″ and 3.5″
WELDING ONTO AXLE: Pinion angle recommendation is -2 to -4 degrees when used with CalTracs. NOTE: This is the angle of the pinion in relation to the angle of the output shaft of the transmission, NOT the driveshaft. Add the angle of the pinion yoke to the angle of the output shaft with the vehicle sitting at rest with weight on the tires.
SET OF FOUR SQUARE U-BOLTS w/hardware
3″ axle diameter x 15″ long, axle BELOW springs.
Square U-bolts, Grade 5 material, zinc plated, 9/16″ diameter. Set includes 4 U-bolts, plates, nuts and washers.
SQUARE U-BOLTS (spring OVER axle): We recommend torqueing truck/square u-bolts to 90-100 foot lbs. After running the vehicle down the track a few times, we also recommending checking the u-bolts and readjusting if necessary. Please see CalTracs Installation Guide for more info.
(SQ300x900 shown)
SET OF FOUR SQUARE U-BOLTS w/hardware
3″ axle diameter x 9″ long, axle BELOW springs.
Square U-bolts, Grade 5 material, zinc plated, 5/16″ diameter. Set includes 4 U-bolts, plates, nuts and washers.
Calvert Racing’s square u-bolts are 9/16″ ” diameter. We recommend torqueing truck/square u-bolts to 90-100 foot lbs. After running the vehicle down the track a few times, we also recommending checking the u-bolts and readjusting if necessary. Please see FEQ page or CalTracs Installation Guide for more info.
(SQ300x900 shown)
SET OF TWO SPRING SLIDERS
Designed to fit Calvert Leafsprings installed on ALL CARS & TRUCKS (except Chevy Bel Air). Outside diameter aluminum bushings: 1″.
May also fit most Chrysler factory springs due to rear bearing size.
Heavy Duty roller bearings keep the leafspring and body from binding up during suspension movement. Replaces the existing shackles.