I also wanted to add that since the KA doesn't have a fully counter weighed or knife edged crank that there are affordable alternatives.
Did some research on crank scrapers found that this company makes them for the KA...
http://crank-scrapers.com/prod01.html
Some people can look at them and think that they are worthless, but it is to break windage in the crank case, and increase HP. I am not going to say that it is any type of significant HP, but for $50 and a 3HP gain at peak I wouldn't mind having one. Especially since people have claimed that it increases rev as well.
If ecu tuning and ITB's isn't your thing,(although I do plan to do it in the future) you can just have the TB bored, and ported from
www.maxbore.com.
RBS14 mentioned a diverse amount of cams available, I believe the im Wolfe is the best streetable cam on the market(although it cost the most)
Great write up RBS13.