Aluminum Heads vs R/T Heads

Looking at possibly buying the Eddy aluminum magnum cylinder heads. I currently have the big valve R/t heads. They aren't ported they are just smoothed in the runners and have been bowl blended. The cam has about 250 duration for both exhaust and intake and I am around a 545 lift. I'm curious how much more hp I could gain with the aluminum heads??

The R/T heads are very heavy so I know I'll save the weight but other than that I'm wondering if its worth the purchase compared to the heads that I already have. Thanks!