I recommend putting a variable speed DC motor on the Delta. I turned on
that combination of old Delta/Rockwell with a Chuck Woodruff motor &
controller for years. Variable speed with DC really makes that a usable
"modern" machine. The Reeves drive acts as a gear shifter to always
maximize torque at the speed that you want. Since you are paying almost
nothing for the machine, why not go a bit higher and get a really good
motor? If you like the DIY approach, there is a lot in the archives about
installing a treadmill (surplus) motor on a lathe.

Have fun!

-CD-
boulder, co