Here's my recent progress in the past week or so.
Motor mounts are done, and next up is a few purchased parts. Need a couple timing pulleys and a belt, and a split collar to clamp the screw on to the motor shaft.
I'm using the original cross-slide screw assembly (for now, anyway), and a 3/8-10 acme screw & delrin nut for the Z axis (that IS what you lathe guys refer to as the Z-axis, right? Pardon my ignorance, as I'm primarily from mill background).

One of the criteria for this project (other than low-budget) is that I didn't want to grow the footprint of the lathe excessively, and it looks like I've accomplished that so far. I'm extremely happy with the motor mounts. I will lose about 1/2" travel from mounting the motor this way. I can definately live with that.

So far the only permanent modification to the lathe is 4 m6 tapped holes in the back of the bed.

MACHINED MOTOR BRACKETS, READY TO PUT TOGETHER


STRIPPED LATHE, READY FOR THE NEW MOTOR MOUNT BRACKETS


NEW MOTOR BRACKETS & MOTORS INSTALLED