I'm looking for fics in wich spike has a soul, post season 6 or post chosen, and goes back in time to season 1 to change the past and save buffy from heartache and pain and have a real possibility to be with her. Spike has to be in his body from the past, no two spike at the same time. Thanks.

It starts before S1, but well worth the read:

Anticipation by 2writers4spike

Having no idea how it happened, Spike finds himself back in 1977, reeling from a newly acquired soul and more guilt than most could handle. After dodging Drusilla, his main focus is getting back to his own time and back to Buffy in Sunnydale so that he can atone for all he's done. That is, until he sees the newly born slayer in 1981 and goes off in a new direction. Can he stop the events that brought misery to Buffy's life, or will he be forced to watch destiny destroy the woman he loves all over again?

g0tik4_
And Here We Go Round Again under her pen name peta here on TSR or under Megan on EF. Excellent long fic where Spike is sent back in time when he drunkenly makes a wish to Anya at the magic box after Buffy dumps him when Riley shows up. He does not have a soul though.

Dreamweaver's His Way.
Post NFA Spike is sent back to School Hard to make things better for Buffy.

I 've read them all already, thanks though!

Have you read Fix You by Enigmaticblue? That's one of my favorites. It can be found on Nocturnal Light.

To Trick a Witch by Peta

Summary: Buffy finds herself caught in a world of witches that have it in for her. On the brink of a nasty spell, a stranger comes crashing into her world. Will he avert disaster, or ensure Buffy gets what is coming to her as the Slayer?


What You Wished For by Pfeifferpack

Summary: Spike finds himself having a wish granted with unexpected results. The perfect opportunity for Spike to "get" his third slayer brings the vampire to a crossroads where he discovers a different goal altogether. Spike learns not only to be careful what you wish for, but also that when you swim in the Nile too long, you could drown. Starts in S4 at the beginning of "Goodbye, Iowa" then takes a quick turn to S1.

In this one, Spike doesn't have a soul, but he does go back to S1.