Tom C
Don't have one for sale but went down this road myself. Delta never offered a 3 HP motor with that pre-NEMA frame, so when converting, you'll either need to drill the original mounting plate for new holes or, preferably, locate a plate from a later machine of that basic style. The latter plates had two sets of holes, one for the pre-NEMA frame and one for a 145t frame. When mounting the new motor (I found a used TEFC Baldor for $150), you'll also find that the junction box is mounted on the opposite side of the motor housing compared with the original unit. Because of that, make all your motor connections before you pop the cabinet back on and stand the machine upright. Your knuckles will thank you for it. As an aside, the conversion to 3HP was well worth it. Although some guys love those old R-I motors, IMO they're too anemic to spin the larger 3/4" bore cutters available today.