Spot on with the foiled head etc, but I would give it more like 12 - 15 tanks before leaning too much. I know the new 66's have reduced initial pinch as compared to the older Gen 5 motors, but they will still need a reasonable bedding period like any other motor.
I have used the foiled head / run rich at 100 - 115 deg C break in method on all my GO's, and they are still running strong with good compression later in their racing lives I always ran 12 tanks foiled working up to very short full throttle bursts on the 12th tank. Then I remove the foil and tune to a moderate race tune, just a little on the rich side and run easy for another 3 tanks around the track. After these last three tanks I put a normal race tune on and let her go. Replacing the rod, pin, pin clips and maybe bearings at the 8 - 9 litre mark.
I then change bearings and rod every three gal of race time after that. Maybe a bit on the overkill side, but 3 gal is a lot of of hard racing time, and I've never had an engine problem or failure to date. Just my .02c worth.