K Frame ID and Information - WITH PICTURES!!!!
Lots of torque rips the biscuit mounts apart. Don't have that problem with the spool mounts. Plus the sway bar goes through the k frame rather then in front of it (the sway bar tends to hit on lock to lock turns on the biscuit mount type frames because the way that are mounted).
If you're going to use the spool mount frame, I recommend that you get it fully wielded (adds strength to the frame) and get it powercoated (I did both to my frame).