take a pic of the front diff, we might be able to verify that based upon the bolt pattern. Some units came with hybrid units, dana 35 with Dana 28 internals or something to that effect.. be best to dbl check than assume
The easiest way to check to see if your Dana 35, has Dana 28 "Guts", is to pull the fill plug out from the front. If you can see the main cap, you have the Dana 28 guts (Sorry!). If you can see the end of the carrier, you have "The Real Thing".