Unfortunately those actually are designed specifically to fit only the 155-163 version of the 2007-2010 RMK. The factory footbed is the same (144 155 163) but the rear suspension bracket is in a different location. The 144 version has a larger rear evacuation hole and cleat placement pattern. The key to your install is tying the rear suspension bracket into the Better Boards so it's important to stay model specific.
FYI
The 2010 version of all of these models have been updated with a different cleat height, smoother foot catch pattern, cut paths, and better hole placements to further enhance performance, durability, but not endangering the rider or sacreficing your sled's structural integrety. In addition we also finish grain all of our metal and chemical prep for the ultimate in finishes performance and durability.
Hope this helps!