318 manifolds to 360?

Hi Guys,

Does anyone know if 318 manifolds are the same as 360? I thought I read somewhere that they are interchangeable, but could not find it anywhere here on a search. I need a set of rear exits for my 64 Dart which has an 89 360 in it, and have a chance to pick up some free 318 rear exits..

Thanks for any knowledge, I appreciate it!

Tom