First off I'm not going to say what heads they are so there wont be any brand bashing, but there NOT ProComps. And the seller is standing behind them and buying them back, so I got REALLY lucky there.
I found a crack on some heads I bought and I would like some opinions on what might have caused it or if its just a head design issue, I dont want to get another set if its a design issue. They are aftermarket aluminum BBC heads.
What was found was a crack in the intake valve spring area that goes from the valve guide straight towards the rocker stud, its visibly all the way through the spring area and visible in the intake port. Is this an area thats prone to crack ? To much spring pressure for this head ? There are a few other areas (under other valve springs) that dont have big cracks, but they look funny, kinda like a bunch of small stress cracks, Also, the heads where not ported at all in that area of the port.
I can post pics if needed, but it looks like a crack.