Well it is getting close to that with these TF heads. I'm considering making my own valley plate so I can just run paper gaskets between the intake and the head. I haven't quite figured out how to do it yet so I'll stare at it some more.
It is possible that the bathtub is costing me some power. There is a slight bit of overhang in a few areas but it isn't much.
Andy years ago after we decided what intake we liked and were going to stick with we would weld a plate across the bottom of our big block intakes. I wish I had one left to post a picture but its not that hard.
