EQ Magnum heads

I have them on my Duster. I got mine from Hughes, which I'm pretty sure start life as EQ heads before Hughes does their work to them. I don't think you would want to run much more than .600 lift with them, even if machined to take that kind of lift, because of the skinny studs, unless you used the Hughes shaft mounted rockers. I'm just over .600 with 1.65 rockers and Jomar stud girdles. I would recommend the girdles if it's going to be high-revving or over about .500 lift.
Mine make good power and torque, and have more potential in them with a different cam. I'm running a hyd FT cam (Comp XE295HL).