'Pop's Engine' another 440 on the dyno.

More flow, smaller valve, smaller port size all = MORE POWER. If we can get 315cfm out of small block heads with 2.08 valves, why not big block. Some times big valves just get in the way LOL

Good answer. The guy I work/worked for(sales),thinks this way . He knocked 270-ish ,with the Mopar 1.97 style valve on R.H.S. La heads. Sorry to the op: Those ARE nice numbers,with a 2.08 intake iron RB production head.