the low and mid lift numbers are in your valve, valve job angles, and chamber

im sure you have a 55 degree seat or steeper on that to get those numbers,, with hard coating the valves ive run as much as 60 degree seats,, maybe you have that,,, which hurts low lift bad...

its just your claims are off the charts,, nobody is trying to say you arent qualified to port a head or whatever,, its just unheard of to beable to get a port in that head,, that big,, to flow that amount of air

and to the guy who asked about how much you moved the guides,, or how big of a valve,, he must not have read that earlier you said you didnt do any of that,, the head is mechanically as recieved from mopar..

im doing a d-3 ford program with a 2.250 int valve on a 4.165 bore for a nhra comp project,,, if i get the kind of numbers you claim out of a better designed head,, ill be great!!! 373 inches,, 450cfm,, should be enough to make 1040 hp at 9500rpm