yah i think your thinking of mikini jeting with the 300 & 30 p . kiehn are much, much differant jet numbers.there a thread on here that shows people mods,elevation and jeting. give it a look see http://bansheehq.com...showtopic=99361 im sure youll find somone with your set up and elevatin or close to it goodluck and to find your carb size, jus caliper the i.d of the filterside... ...i think ??