The factory rear shock location is the first thing to check. QA1 52897 uses that area for its sway-bar end links, so the current maker page requires a QA1 rear coil-over conversion and excludes OEM rear suspension and shocks in the factory position. This rear kit uses a hollow 1-1/4-inch 4130 chromoly bar with mounting hardware and polyurethane bushings for the source-backed 1963–1972 C10 application.
The exact guide removes the factory shock-mount rivets, reuses a bracket hole and drills one 3/8-inch hole per frame bracket. Choose the supplied mounting tabs for the amount of rear drop, then level the sway-bar arms with the truck at ride height. Set the links on the settled truck; a dangling axle is a poor measuring jig.
Measure the axle housing before ordering. The guide says the saddles were not intended for the wider center sections of fabricated nine-inch axles; adapting those housings can require modifying and welding the saddles. This listing does not promise an unmodified fit there. Follow the guide’s spacing, torque and clearance checks.
California warning: Cancer and reproductive harm. P65Warnings.ca.gov.
QA1’s linked guide excludes installed products from returns and provides a one-year warranty against material and workmanship defects to the original purchaser, subject to its stated conditions; repair or replacement is at QA1’s option.