Casting date
 

I will look for the date code and add pictures later today
Thanks All for your help

Casting #
 

The rear has a casting # 3894860N does this indicate a posi ?

No, a posi code would be included with the assembly code with an E as you have in the first pic.

12 Bolt...
 

That is the casting number for the 12 bolt center section....68-69 Nova and Camaro

The posi designation is in the stamp on the tube...there will be an E below the gear ratio and date. the E stands for Eaton Posi...of course, you should always look inside to confirm what is in there.

12 bolt...
 

Mike...

One more thing...should have clarified...the BT code actually designates the posi from the factory...the E indicates the supplier of the unit. If you look at Colvin's book you will see a listing for all the possible codes and applications.

Tom

12 bolt pictures
 

dding a couple pictures of the 12 bolt think I have the date but it’s hard to read.Also getting the leaf springs and traction bars .$1700 . What do you think

Looks like 09(?)- 24-8 for the cast date and 09-27 for assembly date. ( Thought cast date should have letter for month ).

Great for an early car ! $1700 is a great deal if it’s a working complete rear . Jmho

Seller needs to be willing to pull the rear cover so you can see what is actually in there.... assembly build codes guarantee nothing after all these years and with a non original cover, there could anything, including trashed components, in there.

13 bolt
 

I picked up the 12 bolt it’s in nice shape not all pitted up . The casting date is I so it goes along with the September BT stamp.Thanks for the help
I am looking at Lakewood traction bars the kind with J Bolts and they extend in back with another clamp.I am trying to verify they are Camaro/nova . I will post some pictures.
Can anyone tell me anything about the leaf springs pictured? 5 leaf? GM or aftermarket?

Traction bars
 

Any info on the traction bars?Will they fit 69 nova