Building your own headers.

My concern If it even is one. Is how do you know which is the right way to make the bends in the tube or does it matter or as long as I make each tube let's say 32 inches long. Does it matter how many bends are in each pipe? Sorry I know they are problay dumb questions. The op with the blue duster. Very nice looking headers. I was thinking about buying the plastic header kit and useing them to mock up a set of headers. I don't know how long the hookers are that are on my dakota now. But could I use them as a basic pattern to build my 1-7/8 diameter headers. I mean copy there design but use 1-7/8 tube. Here is what they look like.

https://www.summitracing.com/parts/hok-5803-1hkr/make/dodge/model/dakota
Also I don't have any inner fenders so I could also make them fenderwell.
Also I missed wear it said my headers are 33 inches long