Equal spacing of notes in a bar

[William Marchant]

I have looked though the documentation without finding what I need. The 
attached code gives me a triplet whose notes are spaced according to the 
words.  I would like to equalize  the spacing between the notes.  Is 
there a snippet I have missed, or some technique that will provide this?
Bill

\version "2.18.2"
global = {
  \language "english"
  \key bf \major
  \time 3/4
}
melody = \relative c' {
    \tuplet 3/2 { bf8 c d }  c2 |
}
  VerseOne = \lyricmode {
  Give me a big
  }
 \score {
  \new ChoirStaff <<
    \new Staff <<
      \new Voice = "Song" {
        \global
        \melody
      }
      \new Lyrics \lyricsto "Song" {
        \VerseOne
      }
    >>
  >>
  \layout {
    \context {
      \Score
    }
  }
}