He's talking GAWR (gross axle weight rating).
Full floaters were optional on 8 lug 8600 LB GVWR 2500s. If you had a 350 (5.7 Vortec) they came stock with 9.5" semi floaters. Only the 454 and 6.5 diesel trucks were guaranteed to be 14 bolt full floaters with the 10.5" ring gear.
Full floaters were optional on 8 lug 8600 LB GVWR 2500s. If you had a 350 (5.7 Vortec) they came stock with 9.5" semi floaters. Only the 454 and 6.5 diesel trucks were guaranteed to be 14 bolt full floaters with the 10.5" ring gear.