I actually found it on Comp. Cams website where they were reprinting the entire article for their advertising. But it was entiteled "Danger Mouse, Total Recall". It is Test #10 where they added the Air Gap.
FWIW,they were using stock 461 "Camel Hump" heads, a Comp Cam XE256H hydralic cam w/212/218 durat. @ .050,.447/.454 lift., 1.5 full roller rockers, & a Speed Demon 750 carb. All of these were added in previous steps so you can see what does what. The Air Gap had a maximum of 438 lbs of torque (20 more lbs than the 750/Weiand) & 24 more max. HP at 380HP. More important there were significant gains at every step from 2600 to 5600 RPM's. Interesting Stuff if accurate.