Dana 60 Drum Brakes

[Old_iron]

I am going through the brakes on my replacement Dana 60 Rear, and am not very familiar with them at all.

Do you guys see anything in there that I should replace? Spring kit?

Is there any way to function test the cylinders without having the system hooked up?

How can I check for rust in the brake hose inlet area (where the lines enter the brake housing)?

Is this grease (attached) fine to repack the axle bearings with?

Lastly, what type/weight of oil do I use in the diff once I'm all done?

Thanks!