Scott, if those servos are that old, I would question if the savings of a few, inexpensive, reliable servos is worth, loosing it all on old, questionable servos. Tower sells new std servos, that are really Futaba S3003's for about ten bucks a piece. I've had problems with servos that were only a few years old, such as Futaba's 148's. From a safety point, also, better, newer equipment makes more sense. Hope this helps. Good luck on resurrecting the antique.