572 RB Street motor advice?

Depending on your weight and ET goal, and if starting fresh, I would go B1 heads. Or if your looking for the cheaper option, Indy Big EZ325 heads.....The B1's will out run just about anything out there. I run EZ1 heads in my 2650lb car, and it runs 6.12 in the 1/8th...with a 400/512

The OP wants to run a cross ram so the B1 heads aren't an option. The EZ heads would work, but Trick Flow 270 heads are better quality and lower cost than the Indy heads.