OK, let me show what I want.
This is my buddy's Dart, it has a 360 and the 284 purple shaft. Remember the 284 has a 108 lobe, while the 280 has a 110 lobe. I believe the 110 lobe will be better at low rpm.
I want a little smoother idle, not like stock, but streettable.
http://www.youtube.com/watch?v=z5MpmY9X3dU