RHS heads with 1.44" O.D. valvespring?

I'm confused. My RHS/Indy LA-X heads have approx. 1.5" spring pads with the guide "step" a little smaller than 1". The Comp Cams 26056 beehive springs I run are advertised at 1.454" O.D. and drop right on without any machining. Are yours the Magnum versions with smaller pads?

Plenty of clearance for my Harland Sharp rockers. But I had them "adjusted" for better geometry only.