There's nothing wrong with the KA, despite the endless and countless pricks who will speak poorly about it before they read about it. If you do your research you will find that all KA builds that have made huge HP and Torque gains were all turbo, not n/a. Like stated earlier in this thread, nobody makes a dd n/a KA... You can make a dd turbo KA, and for that you just need to do your homework, and prep you're internals; forged pistons, h-beam rods etc. If you rebuild your bottom/top end with going turbo in mind you'll have a beast of a motor thats dd.
Check out KA-T.org for you're KA extremist info, that's what they do there, nothing but monster KA's. But as for going n/a??? I dunno bout that one, when you're done with your n/a build you'll be about as intimidating as a box of kittens.