89white50, It's all in the combo fella's...everyones intentions and expectations are a little different. What is a daily driver to me may be a weekend warrior to you, and visa versa. I use a lot of Probe pistons, if you need a set let me know
Mustangsally, you say you already have a DART 331. What are the pistons specs? Flat top, dish, dome? This will also help narrow down the head choice. Is it NA, N2O or Boosted? I personally would not use any of the heads you mentioned above.
Modular, go with a solid roller and I'll ship you out my old N2O custom billet cam. .688 lift 268/272 duration

you'll have to spin it 8000rpms though

Actaully I have not really been inpressed with the TFS cams that I have used, if you want a shelf cam to work with the N2O there are better grinds. If your going to use the stock AFR springs you are limited to a point...