I agree with flyfish. The OOTB ports on the edelbrock head will routinely support 400 - 450 hp when built and calmed for such.
Here are two threads to compare power, parts needed and then you can read into there pricing.
Here is a mild cammed build with edelbrock heads. Just proving you don’t need a ton of cam to make a good street powered mill.
The everyman's 360 LA Eddy headed engine dyno tested
Here is another thread by the same author with ported Edelbrock heads on a 371. (.070-360)
371 build W/Big Mouth heads
