When he does the heads for most of the tuners all they do is sell them on to you... there still not bench tested...... i know what ur saying tho....` My mate bought a custom cast eurospec head and gave it to the man is the shed....you should have seen the amount of extra flowing he done to it.. It was for a g60 and it made 235 on the rollers @fly with a 2.0 bottom end. STANDARD CHIP AND PULLEY aswell.
If no one else can help. and if you can find them. Maybe you should hire........Racepower motorsport 01322 386677 tell them lee sent you Lee