if you have 28 spline axles did someone put a 31 clutch hub in the posi.if that is a 59 rear end i did do up a 59 for a 34 ford with a 4 spider posi axles work off the newer posi and a 60 bronco with a newer 4 spinder posi one may have had new moser axles and a 37 ford never remember a axle deal but that was 12 years ago and i was deep in to them i stop doing alot of them when most of my customer went to bikes