School me on trans basics

okay gents, I retract my statement on the correct bolts in place. These are 7/16, and looks like PO shaved the heads down to clearance them. does anyone know the actual head thickness of the correct bolts, or have a link to the correct ones? They have clearance to the dust shield, but I'm still getting an intermitten sheetmetal rattle/contact sound. No pattern to it. Under load, on over run, in park, at idle, at cruise, in reverse, etc. I hear it for 5-10 seconds then its gone, and still have a high vibration right at 2900-3000. Thinking it's time to give Hughes a call. *sigh.