My machine shop has told me that the 5.9 Magnum heads off my motor are cracked. I need to pickup some replacement heads. I understand that junkyard Magnum 5.9 heads are prone to the same issue, as it seems that the castings are poor on these heads.

So, I'm in need of some replacement heads. I want heads that are a total bolt-on replacement. I thought about Edelbrock heads, but they require new rocker arms, studs and pushrods. In addition, I'm not doing any upgrades to the short block, so what are my possible options for replacing my existing magnum heads with something that is not crack-prone?