What do we have here?

[diggerG]

Early J trucks were still 5 x 5 1/2", at least through 67.

Yes they were John. up to 1973 I believe. Jeep went to 6 bolts for the Quadratrac.
diggerG

 

[diggerG]

your picture looks like Cutlass hubs. Good H.D. hubs IMHO.
diggerG

 

[5JeepsAz]

your picture looks like Cutlass hubs. Good H.D. hubs IMHO.
diggerG

Leak got cleaned up. Seems to have been caused on the sunny side of the truck, parked for months, seeping out. Keeping an eye on it