That seems like a waste of money as you wouldn’t change any geometry. I could be wrong but the khaos rail has a steeper profile to accommodate the longer shock/strap, so just swapping the rail would change nothing.
I want to do khaos conversion aswell so I can increase ride height in conjunction with ice age elevate spindles, trenching is a The main concern for me even with lockout shocks because the approach angle is increased which is good for wheelies, bad for trenching/ getting on top. my buddies cat with its shallow approach angle gets on top of snow much better than my axys