[Keithc8]

I have used the Blue Thunder heads and have some in stock. I have some nice CNC programs on there heads. The problem with the small chamber as you describe it is that it kills the flow down low where most street engines need it. I had to open the chamber up to about 80cc to get the valves un shrouded. The head is plenty thick so you can mill it down if you want but this can also be done with the Edekbrock heads. The Blue Thunder also takes a special rocker stand that they sell for the regular style FE rockers so some of your after market rockers do not work real easy. There is a T&D rocker assembley available for it. The heads cost almost twice as much as the Edelbrocks when buying the heads bare and they need to be worked on as well. I just have not seen enough advantages if any in the MR style head to justify the cost difference. Just let us know how we can help. Thanks, Keith