offset of chords

[MING TSANG]

Dear lilyponders,

Is it possible to tweak chords outside the four eighth-note beam?

Ming

\version "2.19.54"

\language "english"

{

\key g \major

  \numericTimeSignature

  \time 4/4

  \tempo 4=66

<<{<f'af'f''>2 <g'bf'g''>2}\\{ef''8 df'' c'' bf' f'' ef'' bf' g'}>>

}