The first set is on mega blow out sale (see the who's making over 300 rwhp n/a thread in the 96-98 section for details) 1700, no core charged, 60 day full refund guarantee if you are not completely happy.
I don't have anyway to test them, and I don't feel like giving away the money I have invested, so I ask that someone capable of a before and after 1/4 time, OR dyno numbers would get them, so I can have some objective results. I would like to get both, since I know if I get one, someone will be like "yeah, but you didn't get 1/4 mile times.."
The first set are new castings, stock sized valves, viton seals, fresh bronze guides and SS valves, Manley Nextek springs, and factory steel retainer's. They are also blueprinted for cam tower alignment (that dimension was way off on my new heads) and for the cam bearing size. The price (after the first set) is 1800, plus a 200 dollar core. Since I can usually find the heads for that now. They are never more than 300, so I don't have to eat much.
All the following sets will have the same machining done, they will just use your core or mine.