Can't decide on heads. . opinions??

Were currently building a 340 for my dart and a 360 for an 81 stepside but we're relatively new on building small blocks and can't decide what heads to run. A few people told us to look at the edelbrock heads but when I called them they said ported their heads flowed about 270 cfm, and honestly that just not enough for what we're wanting. And someone told me about w2 heads but I've heard you have to run a different style valve train and not really interested in that. Does anyone in here have any experience with any good aftermarket heads that could help me out with some info? It would be greatly appreciated. Thank you! :)