Wow its great that you engine builders are posting info like this, I really appreciate it. Did you go with a Thumper over say an Extreme energy because the specs better suited what you wanted or for the rough idle? I see that the thumpers have a tighter lobe separation. Also is it a roller or flat cam? One more thing, seeing that this is an A body site it would be great to see what effect Schumacher shorty tri-Y headers have on the power compared to the big race headers, especially considering the cost, compromises and flat out pain in the *** issues the big headers cause in an A-body.