I have a project svn:\\Foo with branch and trunk:
When I run plan for a trunk, with last revision number for trunk is revision number 5, but branch has revision number 8, so result revision number for version is 8 for a trunk path, but I need 5!
How can I get it without Run customised build?
As you might know, revision numbers are linear in Subversion (unlike Git) and thus Bamboo wouldn't have anything new to build even if the revision number in your build result reflects the latest revision.
The commits tab in the Build result summary page should tell you which branch had the changes. You may use plan branches to isolate changes between branches. Do you have a reason why you expect the latest revision of your trunk that had changes to be listed?