Good luck, evo 4-9 engine is flipped from the evo 1-3 and DSM configuration. Timing belt is on drivers side with tranny on pass side for evos 1-3 abd dsm. Reverse that and you get evos 4-9 (no idea on EvoX and its 4b11 configuration)
Plus the GST/GSX already come with a 4g63 same as the evos but with better head. However not better enough to warrant all the difficulty of the swap. You would be better off with a built head and great cams. Just like trying to do an evo9 twin scroll 16g swap into a dsm, by the time all the work is done and the recipts are added, you couldve bought twice the turbo and still saved money and bolted it on direct.
Well, that threw a wrench into my gears lol. I don't know enough about DSM's yet (obviously lol) but i really like GSX's so having one at about 400ish AWHP would be a really fun car. I'd leave it looking stock and do as much weight reduction as I could and surprise the hell out of people lol. :beer: