No, they are not new. They are used, and they are 906's. I am aware of them being the less desireable head, but I know lots of guys using them that are pleased with them. I am not building a drag car, they will still be head and shoulders above a swirl port head.
John, I should let you throw these on your flow bench, or have you tried a set of 906's already?
Martin
Well, I think that's real reason you don't want them. You're not building a race car, you're building a truck that would see more benefit from low/mid range TQ.
I'm just passing on what I've learned but I have no experience with installed 906s.