Rear Diff Q's and advice

[groundbound64]

Hello All,

I got a couple of questions for you and need some advice.. I going to update for 64 c10 with disc brakes and convert to 5lug (5x5). The front is easy but it's the back.. My question is..

1: Should I use the factory OEM diff and install a new 5 lug conversion Axle kit ??? ( Brother's, Ecklers sell them )

or

2: Should I find another diff for it? I've heard alot of guys use 73-87 diff's ??? Just not sure if it's the same width..

What do you guys use it your own trucks???

Thanks
Jay