Using the same body, it's quite impractical. But using a new
body, it could be possible.
As for earlier discussions about rear axle load due to the addition
of the air con unit, I believe it is possible that it is capable of
bearing the extra load since we have 10.3m 2-axle airconditioned
double deckers around the world. Of course it is entirely possible
that these buses may have a strengthened rear axle that the VOs do
not have.