Bottom end info?

Well, I'm trying to set up a low 12's engine. I'm reusing the pistons and probably the heads. At this point cam & induction are up for grabs. This will be normally aspirated and I'm gonna try to stay off the bottle (nitrous) for now, but I'm open to whatever will give me the best torque/HP ratio. I doubt with the "J" heads, ported or not, that I'll be able to push it to much over 400HP but you guys are the experts and know more what I can achieve better than I do. Thanks for the replies!