converting Bridgeport powerfeed to CNC DC servo

Considering the relative ease to add, and low cost
that a Bridgeport table powerfeed costs (both X & Y &knee),
has anyone taken one apart to see what kind of motor is
in there? Probably AC.

Can it be replaced with a similar size DC motor,
and then be run from a G340? An encoder needs
to be added, obviously.

Any ideas?

Doug Fortune
http://www.cncKITS.com