Your rear axle appears to be from a 2 ton or larger, my '57 2 ton has that bolt pattern with 22.5 Budds. Fronts and rears are the same on 2 ton and larger.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
| 
