Lay out the cab and radiator-support mount hardware before the body goes back down. Whiteline W93546 supplies black polyurethane bushings, tubes, washers and grease. Bolts are not listed in the supplied contents, so confirm the correct hardware and its condition before disassembly. Cab bolts are a poor place for optimism.
The source-backed application is 1967–1971 Chevrolet C10 Pickup Base and GMC C15/C1500 Pickup Base, 2WD, within the engine configurations listed by the supplier. Match your original mount locations and hardware; the year alone does not establish every trim or engine combination.
The supplier rates installation as difficult, with an approximate five-hour labor estimate. Use the vehicle workshop manual and a suspension specialist for body support, hardware sequence and torque.
California warning: This product can expose you to chemicals identified by California as causing cancer and reproductive harm. More information: P65Warnings.ca.gov.