Rearend length diffrence?
The chart, at least regarding the "all" A-body 8.75 is incorrect, it should read 52.4", not 51.4". The 8.25 is 51.4"!
I did the swap on my duster, from 8.25 to 8.75 width Dana, and I was able to drop the spacers, and still have 1/4" clearance. Below is a shot of the table contained in the ZIP file document on 8.75 rear ends I found last year.
The chart, at least regarding the "all" A-body 8.75 is incorrect, it should read 52.4", not 51.4". The 8.25 is 51.4"!
I did the swap on my duster, from 8.25 to 8.75 width Dana, and I was able to drop the spacers, and still have 1/4" clearance. Below is a shot of the table contained in the ZIP file document on 8.75 rear ends I found last year.