http://www.micra.org.uk/threads/ga16-swap-info-pool.57739/
Applies to GA14 too.
HOWEVER, if I was only going to a 1.4 I'd just source a cga3 bottom end and put a cg13 head on it. If you're going to the effort and expense of a GA swap stick the 1.6 in it.
Cg is much easier to tune too, especially na.