Does anyone have any idea what would cause the Valley Plate to have a bubble or hump in it? I noticed it after we ran last round at Night Under Fire at Trails. The car runs fine. Last evening I went through the test of checking the compression, presser in the radiator, if any water spit out of the plug holes and if the damper may have been plugged up. At first I thought I might have blown a head gasket but everything checked out ok. Tonight I am going to pull the manifold off. Looking for ideas I am a little baffled now.