[cyclone427428]

I was wanting to stick with cast iron heads. I heard aluminum heads dont really work well on the street. I guess the real thing is cast iron vs. aluminum. Which performs better? Weight ratio doesn't matter, just performance. I was mainly looking at Blue Thunder and Dove. I've also thought about notching the block to run 427 Medium riser heads or Tunnel port heads. I think i'd much rather stay away from notching the block. Anyone have any ideas or thoughts?