ET'S with ported J/or other iron heads SB

A good set of iron heads will be close money wise to a set of new aluminum heads. Especially ported. It comes down to airflow, and the "whole package". You dont need much airflow to run well if the package is efficient at accelerating. So iron heads can carry you way into the 11s and probably closwe to 10s with moderate porting on a 340/360 build prety easy. But they will cost close to the same $$ as a set of RPMs, and the RPMs are lighter, have a better chamber design, and have more potential for future growth.