axle info

[wood78]

i was just wondering what kind of rear axle is in my truck, it is a 70 chev 3/4 ton 4x4. the diff cover is round and smooth and i believe the center section can be unbolted. i'm not sure on the center section part because i haven't seen the truck for a couple of years. its at my parents, a couple states away. the reason i'm asking is because i am thinking about working on the truck this summer and was wondering if it is a good strong axle or if i should look for a replacement. i also think that it had drum brakes in the front and was wondering if it would be better to change them over to discs or just find a different axle that already has them. thanks for any help you might be able to give me.