I got an old Rockwell 378 drill - same as model 634/635. This is the old single-speed beast with the D-handle on the back that will rip your arm off if you get it hung up! Anyway, I took it apart and cleaned it up, re-lubed gear reduction unit, etc. Ran pretty sweet until the field coil I forgot to put the screws back in turned in the housing, shorted, and burnt open! @&$#*!
Pretty much everything but the field coil is good - e-mail if you need parts. Pricing will be very reasonable (but will double for any smart remarks about what happened ;).
Thanks, Wally