NO! Do you actually believe this?
Adam was made with clay after the LORD had already created everything. Therefore, how could he "help?" Where do you get this from and still yet call yourself a Christian? This is not only strange fire, but another gospel.
Oh, wait. Mormon, right? Well, you'll understand if I don't take too kindly to Mormonism. How long did it take for your "doctrine" to change and say that black people were not "cursed?" Don't even attempt to say that Mormonism hasn't taught this before because I can give you more than ample evidence that it did.
What kind of doctrine evolves? Jesus Christ is the same yesterday, today, and forever. He doesn't change. So why does your faith's doctrine change? The only things with no need for change are perfect. Therefore, your doctrine most certainly isn't.
And it is most definitely NOT Christian.
Adam's physical body, yes. If you are interested in the background on that, see my #1292 (the three big paragraphs), and LDS Topical Guide: Council in Heaven (click any of the links or scroll down to the end of the page and click the Display References button).
I normally don't post all this LDS stuff on a Calvinist thread, but Woody is in attack mode and RnMom is asking all these questions.
We had been told all along that the day would come, we didn't know when, when all worthy male members would hold the priesthood, and how anxiously we looked forward to that day. When it came, in June 1978, we all were jumping-up-and-down delighted! To my knowledge, we still don't know why the Lord wanted it that way, or why in the Savior's time the Gospel was preached only to the Jews until they rejected their Messiah, at which time the Gospel went to the Gentiles.
Regarding the rest of your post, see my #1434 to RnMom.
And our doctrine most definitely is Christian, not as Catholics or Protestants define it, but as the Only One Whose Opinion Really Counts defines it. But not to worry. Everyone of every stripe is denounced as non-Christian by somebody around here.