I think if you have sure-shot audiences/readers then only you should come up with a one long article publication otherwise the best thing is to give your articles in parts(depending upon how long it is). Repitition of a a few results is not always bad. It may help people link and remember the points that you have discussed in your Part 1 and the best thing in coming with two parts is you can assure some pre-available readers for your Article.2
Why I said this is Ramanujam prepared three notebooks with only results and didn't send all of his work at once to the mathematicians of his time. Think if he would have sent his complete set of notebooks along with the solution and derivations then may be he won't have been what he is today.
Only a small piece is enough for people to see the spark in you and keep subscribed to your upcoming works which you can mention (in very brief ) along with your Part 1.
But this is purely a piece of **my personal thinking**. *Do whatever you feel suits you the best for nothing in this world is predictable.* Anyways good luck in advance.