8.25 rear question

Found an abody 8.25 rear I am interested in buying to upgrade the 7.25 in my 71 Duster. Seller says it's a sure grip and has a 2.71 tag on it. If I buy it I would eventually want to put 3.55 gears in it. I have seen that there are 2 different rears , but only one will accept the higher numerical gears. thought I had read it was 2.76 . Can anyone confirm or deny if this rear with 2.71 can be upgraded to 3.55"s ? Thanks