just under $2000 for the AFR heads, I also wonder how the test would have compared to a decent pair of 2.02 X heads. The 360 head had 1.88 intake valves
Important is the .300-.450 flow, which is dung compared to aftermarket heads.
With the iron j,x,u,o,blah blah=170's cfm @.300
Speedmaster 180's@.300
Ideally you want the @.300 in the 190's-205 range to be considered good...and if .400 isnt 220+...make that 230-240 to a banger.
Low lift flow matters , period.