Be sure the front and rear corners of the manifold aren't touching the cross bars that hold down the bathtub gasket at the front and rear.
John has a good point here. The crossbars are only tapered on one side, it they're installed upside down the taper is now on the bottom and the intake could be held up by the non-tapered side.
I will be sure to check this on this install! I didnt pay any attention to that last time! Thanks for bringing this up! I know you use RTV, the right stuff, etc in the 4 corners, but do you also use it along the whole rail on both ends or just the valley tray alone?
