I have a '49 AC B with a 3 pt. setup I made, works pretty good. My tractor was originally sold with a corn planter, so it has two lift arms on the bar behind the seat. I've been told that only the corn planter set up has the two arms. The lift arms behind the seat lift chains that lift the arms that.... this is getting complicated. If you're interested, e-mail me & I'll send a couple of photos.