Edelbrock heads: Adjustable rockers needed?

Well the thing to remember about stamped steel rockers is that they are never a true 1.5 ratio. In fact some have speced at 1.45-1.4 or lower. I think lowest someone saw was down in the 1.3X range. So you will lose out there.

I've never in person seen someone use stamped steel rockers on an edelbrock head. But I'm surprised they say you couldn't. It's essentially a stock replacement head. And a look at the summit page for those heads Edelbrock even says you can use stock gear on them - https://www.summitracing.com/int/parts/edl-60779/overview/