Thanks for the link. I just read it and their numbers were almost itentical to mine. I found that the stock ports and valves flowed 268/160 @ .600" and after a simple pocket port job mine flowed 298/198 @ .600". Later I took those same heads, ovated the exhaust port, installed 2.08" int 1.62" exh valves with a good valve job and they flowed 319/229 @ .600" with 345 fps port velocity on the int side and my mid lift numbers were in the mid 70%'s with the exh to int ratio's. These heads have great, snappy throttle response, then I added the blower