Building up a Dart

I'm agreeing with everyone who said the 360. It seems the best fit for what you're trying to accomplish. I am faced with almost the same dilemma. I have a 360 with aluminum heads that I'm building up however, the power that can be made from a Slant and the fact that it's different attract me to staying with my Slant. In a nutshell, if I were you, I'd go 360. If I were me (am I?), I haven't decided what to go with yet......