Quick update:
The 14" round air filter with 3" element DOES fit. You must get a dropped base however. My throttle return springs and spring bracket were hitting the base and not allowing full throttle arm movement. I just flipped the spring bracket and everything is great. Dave, you will find that the stock throttle bracket will not work without modifying it. I used this http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_86840_-1 and it works great. You just need to change the springs because the ones that come with it are way too strong. Hope this helps