Magnum vs LA bash!

I've only seen the R/T head flow more than 275.

Are we speaking of stock heads only? Because that would disqualify the R/T head since it was never on any engine as delivered.

Otherwise, the 1.6 rocker over the 1.5 is nice. Not a end all.
I have not compared how fat the flow rates are down low between the 2 heads.