Highest flowing sbm heads?

And all of this because I stated in my opinion the Gen III hemi is the mopar small block that can get you on the plus side of 600 hp the cheapest and still be reliable. I wasn't even talking about the challengers/chargers they came in. Those are over 4,000 lbs. I was strictly talking about the topic the OP started in the thread.
400 block and 3.75 crank for 451 cubes.
The 451 is the most reliable Chrysler stroker, with an Indy head can make 600 reliable HP jumping off a log.