gents, I've searched far and wide for the right thread. ESPN version, need someone to point me to a header without clearance issues (92-96 f150 5.0l), assumingly designed specifically for this model. spark plug boot clearance, fire wall, dipstick, you name it. I've had nothing but bad experiences with my Flowtech long tubes, from the collector gaskets, flange gaskets, and most importantly #6 cylinder coil wire and plug.