Found the '78 Schematic, but that's no good since this is the '81 version. So, looking for the Electro Harmonix Deluxe BigMuff Schematic for '81.

If anyone knows where this might be, would appreciate the help.

Try the diy forums at diystompboxes.com

will do. thanks.

You can try here: http://www.freeinfosociety.com/electronics/schempage.php?cat=1