I converted a very similar machine as my first CNC.
For the X axis I used a relatively small pulley and a needle roller to put the drive belt just in front of the saddle, and then put a pair of angular contact bearings on a shaft extension in the feed handle area.
I could then tuck the motor under the leadscrew.
I don't have any good photos (they were on Picasa) but the best of my bad photos are:
photos.app.goo.gl/329ofxNXKxtwDcCy8
photos.app.goo.gl/VeGxmMaT9y4btL2SA
I did this to retain use of the handwheels. A facility I don't recall ever using (as the CNC controller needed to be on for the spindle to work...)
Despite being a very small pulley driving an 8mm ballscrew at a 1:1 ratio it never gave a moment's trouble. (I sold the lathe on, and never heard again from the purchaser, despite offering 12 months tech support as part of the package)
I got rid of it as it was a decent enough lathe, but a terrible milling machine.