The answer to your question is YES... 72 was a transition year. The 8.2 was used for most of the 72 model year then late in the run they switched to the 8.5.
70-72 chevelle or Monte Carlo
A rear end from ANY 1968-1972 GM A body will bolt right in.
No, the chevelle isn't as wide as the impala, you would have to get a rear end from a full sized Pontiac or olds.
No it will not.
1970-72 Chevy Chevelle 12 bolt rear end.
Not without some serious modification. Use a rear end out of a '64-'67 GM A body instead. They are stronger and will bolt right in.
no
That is a 1965 Chevrolet Chevelle 12 bolt rear differential.
find a Chevy 12 bolt rear end or a built up 8.5 rear end.
Not without some serious modification. Chevelles had a coil spring rear suspension while the S-10 uses leaf springs. While I haven't measured, I'm pretty sure the Chevelle rear end is also wider than an S-10 rear end. Now, you COULD change the spring mounts and narrow the Chevelle rear end to fit, but there are alternatives that would be MUCH easier to use in an S-10.
If you cut the housing down to fit the chevelle it will work but to just take and try to put it under the chevelle it's too long.
If it's a similar vintage and bodystyle, yes