This is a new listing on eBay.  M335 368 engine valve covers, dual quad intake, carbs, and air cleaners.
It's not mine or listed by anyone I know. 

Click the link below that will take you to it

http://www.ebay.com/itm/1957-Mercury-M335-Dual-Quad-Carb-intake-368-Lincoln-or-Mercury-Big-Y-Block-/263197600187?hash=item3d47cca9bb:g:jWIAAOSwv~NZtHYV&vxp=mtr


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York