The offsets are not the same. Indy offsets its intake rockers .850 for the 440-1 heads. T&D Machine offsets its intake rockers .725 for the Eddy Victor heads. I believe the Indy rockers can be used on the Victors but the T&D Victor rockers can't be used on the 440-1 heads. T&D makes another rocker specifically for the 440-1 heads.