Haven't heard about the pro Max Magnum heads is that something new? How did they compare to the RT head or Edelbrock heads or are they just a stock replacement head like the EQ heads are? I think I've heard of the promax in big block and maybe La aluminum heads wish there was more pictures of the ports but the one picture it does have of the 2 center exhaust ports they look like something that a little bit of time with a die grinder could be shaped into a nice Port that would flow pretty good with not too much work