What would it take to make 1.44 lbs-ft per cid ?

That Magnum R/T head starts @ 180cc. Those ported Magnum R/T heads will be flowing at least 260-270cfm with a much bigger port.
So?
260 cfm @ 2.23 cfm per HP equals 579HP a far cry from 477!
Who cares the 323 ain't making the same hp per cfm, it's all about the hp curve and the 323 is better, that's what powers your car.