The body mount location on a 73 k5 is in different locations for the rear mounts- vs an 82, the front mounts are in the same location on both (outboard of the frame), where as the rear mounts are inboard on a73, and on the outside for a 82- so I don't think you can just bolt on a 73 body on an 82 chassis. I have never heard of any one doing it, but that does not mean it can't be done . .... the frame for a 73 is slightly different than a 82 as well , due to the rear footwell location. So, if you want a bolt on deal for the 73 k5 tub, find a 73-75 chassis. If you wanta bolt on tub for a 82 chassis , find a 76-91 tub. keep in mind as well that there MIGHT be slight variation in the body mount bushings themselves, but I can not verify this.