My competition sells the 1955 - 1959 Cab mounting kits on the left-hand side some sell them for $39 some sell them for $52. They’re not entirely correct. They’re made in Taiwan and have plastic lock nuts on the large bolts. Mine are completely made in the USA with the right kind of block nuts all the washers you need including asbestosCab to frame pads that will not wear out like the rubber ones provided in the Taiwan kit. I sell mine for $49.95 including shipping satisfaction guaranteed on all my parts, and they come with complete instructions.
1955 2nd -1959 Cab Mount Kit Complete Chevy GMC Pickup Truck Half Ton – Quality Classic Parts