Stage 6 heads

Please see post number 9 for more info. Plug angles are the same. The exhaust ports are raised some over factory. They use a standard no offset roller rocker. I suppose u could use factory rockers but I wouldn’t. That’s defeating the purpose of having good heads. I would say they are at least as good if not better than the Edelbrocks. Trick flow is the best ones out there now. Kim