LEB Ben
Arrogant A-hole At-Large
Admittedly, I haven't searched too hard, but when paging through the Summit or Jegs, I've never seen mention of a one piece oil pan gasket for a 351M/400. Do they exist????
You are looking for the Permadry Plus from Felpro, part #OS13260T. They are one piece, made of formed silicone on a steel backing I believe.