heads

Ask to have proof of them not being cracked.
There worth isnt much. You may very well put more info the head than you can resell it for. It is possible.

From a performance stand point, iron heads are OK. They can be ported out very well. The issue comes in vs. Edelbrock heads via there performance ceiling and cost. Iron heads can be cost effective for a limited ceiling vs. tending to OOTB Edelbrock heads and there OOTB performance which may not be realized or maximized.

It basically comes down to choosing the right shoe for the walk or run.