once you get the jet kit there will be instructions in there. it will tell you what jet you need to use at 3000 ft. im pretty sure it is 160 or close to that. after you get the jet changed you will have to adjust the air/fuel mixture screw, it should tell you how many turns to turn it, i beleave that it will be 2 1/2 turns. like i said it should tell you how to do it all in the box.
-Aaron