Great axle reman Aus:). The first engine photo Cj? That is a model 5 series 1 serial, base with edger groove and axle housing overhang, exactly as Jonesy has stated. (Let me know if your unsure about the serial runs CJ as im happy to clarify:). The second image is a model 5 S2,edger groove with no axle housing overhang. The AC stamping is of the early style so its a bit too early for a model 5S3.
