B/W overdrive parts pictures

[Keith True]

I've been trying to find out who built the B/W O.D.unit I have,I have a couple of pictures of the problem area.It looks as if the splined coupling was pushed too far on the shaft when welded on.It was only engaging 1/4 inch or so of those splines coming out of the trans.It is a 16 spline shaft and coupling.I would like to find out where I can get another coupling.I would also like to know if there is a measurement for overall length for that shaft and coupling,or I have to fit it,then weld it.I had one of these units years ago but it was made by a different builder.That one had a sprocket welded onto the shaft.and another slid on the splines.They were coupled by a double roller chain.