Hi all, i am preparing for my first tournament next month...i have done my preparation excellently except for the kings indan.... i feel there is too much theory to learn in kid

so i have planned to study exchange kings indian....what made me select exchange kid was
1. players below my strengh i can anyhow beat with my play so poor opening selection does not matter here..
2. players at my strength i am ready to face a equal fight...but here too odds are in my favour because i will be very very thorough in my preparation which should help me but at worst i have draw...
3.players better than me then i am happy to get a draw...
guys please tell me how will black proceed in the exchange variation in the following line..
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 00 6.Be2 e5 7.dxe5 dxe5 8.Bg5!?
i like this move and i am interested to know how black will counter this plan...
note: people who think i am sick to play exchange variation please know that i learnt with avrukh book and played a lot of games in internet in the g3 system the problem is not in the KID but in the Grunfeld! in my opinion Black equalizes if white plays g3 setup by d5! instead of d6...if i play g3 system then what black does is simply instead of playing d6 it plays d5! converting to grunfeld and often achieving better position ....

as we can see from the latest game of carlsen vs giri 0-1 it does prove that grunfeld does give better position for black in the g3 system ....
edit: i just looked into my database and found a player named Onischuk who played exchange variation til he achieved 2500 rating

though only for a few times he had to play KID itself