She's a 51 3104. 12 Volt system. I don't think its a recent conversion since it has a Montgomery Ward voltage regulator. Picked up a set of brushes today (its great having an old time parts store nearby, the owner looked at the old brush, walked to the back and returned with a new set. I told him I had some numbers off the starter, but he wanted to check his memory). With the new brushes, I thought that old 235 was going to fly out of the truck. My 8 1/2 yr. old grandson helped me fix the starter, took him for a ride and he fell in love with the old girl. Think we'll build some memories together. John