For B Body cars there were slant six K frames and V8 K frames in 1969.

The 318, 383, and 440 K frames are the point of this discussion. The HEMI may be as well. Someone will have to chime in and comment if it just has the skid plate attached that makes them different.

The manner in which the K frames were produced varied by which components were used from the previous model year and transitions to new components for the next model year. (Sway bar location)

There are 3 different V8 K frames used throughout the 69 model year. They have variances with the bottom component and sway bar mounts. The production date of your car will dictate which one you have. Notice, I have never mentioned a make or model of car, it is irrelevant.

Just my 2 cents.

D