Anytime. Same reason I did it too, ground clearance.
I know some people try longer shocks, along with trimming the chassis tabs. Others said if you free up the sway bar binding on the upper A-arm you get improved down travel. These are all speculative as I never tried any. The XT platforms overall seem to run low, and lack the kind of suspension travel these beasts could use.
Redcat make a hardened diff cup, I put them on but haven't run it since. I used to run mine at a big 1/5 scale track, so there was lots of jumps. I was good about being off the throttle on landing, and i never broke anything other than diff cups, so depending on your bashing, you may not have the same issue I did. I was running all rears, so 5+MM width, same height.
If mine were all fronts, I'd tell you to return yours as new for a refund, and i'd sell you mine for cheap to give em a try.
let us know how it turns out, and post some pics!