Factory Defect SALE!  These were meant to be valve covers for an LT1 engine with a notch for alternator clearance.  They were stamped wrong at the factory, and now both headers have the notch.  They will still bolt on to any 305 - 350 Chevy center bolt heads.  The notch will face the front of the engine on one side and the rear of the engine on the other.  If you are looking for a budget set of nice, aluminum valve covers, these may be just what you're looking for!  Comes as pictured, valve covers only.