Dana 60 with upgraded slant six

Don't even consider a spool for the street in any rear. A limited slip unit OK, but not a spool.
Back in the 70s, my drag car builder didn't recommend a spool even in drag cars. I saw a well known pro stock break an axle right at the starting line and took a hard left turn off the side of the track.
My Camaro used a Sure-Grip differential. I once broke the splined end off a Strange axle at the starting line and my car just lurched straight forward a little.

20220104_080814.jpg