Hose identification

These two hoses run from steal lines to rubber right over the rear dif.

The top of tank one I think splits into two lines and goes to the little grommet-ed things up top.

I think this is right what say ye'

I blame saying fuel twice on the beer...

I'm 99% certain this is the axle breather but I'll post anyway.

This little guy hanging.

2nd on is axle vent tube. not completely sure on the others

I believe you're correct on the first pic. From looking at it it appears it's from the newer style xj's that had the sender mount on the top of the tank. The smallest line will be connecting to a T that goes to the two roll-over valves on the tank. For the other one it appears to be the fuel return which would go to the small port on the sending unit. Easy way to figure out if it's feed or return is follow that line and see if it's the one going to the filter or not.