F-body 8.25 rear for duster?

Got more info about the rear axle.

rear width is 59,8'' drum to drum so its very close to b-body's rear 59,2''
and the 7 1/4 is about 57,4'' drum to drum, have to double check this tomorrow.

So diffirence would be just 2,4'', 1,2'' each side.

so looks like good width for me.

and it is so that 8 1/4 rear axle case is diffirent if there is 2.45 gear ratio so i can't change higher ratio gears like 3.23?