Edelbrock Performer RPM heads SBC any good

Hi ya
Currently i've got cast iron heads that were off a crate 350. But seen a pair of eddy heads.

I know these have bigger valves etc and are lighter.

These are used heads is it worth looking at.

Not interested in max high rev power more low to mid range.

Cheers for any advice.

Gary

for low to mid range i'd say the cost (even used) wouldn't be worth it mate. jmo.
neil.