So the speedmaster heads were measured

The test I’d like to see is a set of OOTB SM heads tested against a set of refurbished OE heads with 2.02’s, with the only porting being a basic bowl blend. Milled to match the chamber volume of the SM heads.
Tested on a basic “hot street” 408/416........ say, something in the 450hp range.

Try to have it where the reworked OE heads aren’t representative of something that would cost too much more than the OOTB SM heads cost. Call it “around” $1500. Of course that number can vary a fair amount depending on what part of the country you live........ but the SM’s will cost everyone the same.

Then, pull the SM’s off and have the basic prep and bowl work done....... see what that’s worth on that type of build.