Actually some boxes run internal stops that can removed by a rebuilder.I've only run into one that was unusuable but Pat at Benchworks went through it and removed the stops. It was very apparent with stops, only just over 90 degrees of pitman swing.
I've done fifty or so saginaw conversions and there have been quite a few boxes with less travel than optimum but still reasonable
I've done fifty or so saginaw conversions and there have been quite a few boxes with less travel than optimum but still reasonable