Headers for 67 barracuda 318 with no modifications

Hello Mopar friends, I’m wondering what headers will fit on a 67 barracuda with a 318 with no modifications, I was told Doug headers would & are there different ones for 273,340&360? I’m still kinda new to all the differences and imagine different heads would probably use different headers, thanks for helping me learn this stuff in advance!
There is a benefit(s) to headers. Even on a stock 318 2bbl. Some disadvantages too. Some are personal preferences. Here is a list of some reasons someone might make this swap:
I suggest buying a quality set (TTI or Dougs) and use a mini starter if you do make the swap.