Oil pan Which one? 408!
Suggest you also take your headers into consideration as well. Headers that fit tight to the block may not like a wider pan like the Milodon.
I've also see a couple of issues with interference to an A-body K-member with a Milodon pan. The K-member had to be notched for the pan to fit.
I'm going with a Kevko pan when the time comes to put the new engine in my '69 Dart.