I am finally assembling my 427 and for some reason I have a shim that was placed in the bag that contained my oil pump and timing set. This shim is .006" thick, has an OD of 1.941" and an ID of 1.488". I do not remember where this goes?? The parts were from my 2005 LS2 (pump and timing set). I am stuck and I have had no luck in any of my manuals or searching on here. Please help. I first posted this in the Gen IV section and got little help.