..have just done modification work on engine and have lost/misplaced few items. Does anyone know what size and type bolt fits into the threaded portion of the LT1 accesory bracket holding the alternator? Can't seem to find the correct size or proper thread.
-TIA

 

I don't know exactly, but you could probably call an F-Body salvage yard such as Billy Grahams and they could sell you one or at least tell you what size.

 

The one at the top going into the accy bracker is M10 x 1.5 x 45.