I have an original 66 Nova 12 bolt rearend in excellent condition.  The ring and pinion is new, 3:55, posi is rebuilt.  Ready to be bolted in and run it with overdrive for great mpg or 1:1 is very responsive in the city or on the highway.
This is the same gear I'm running in my Acadian Sport Deluxe with a 700R4 and it is perfect for me around town or on the highway.
The spring perches were moved a little for tire clearance and will need to be moved back for an Acadian or Nova with stock spring setup.
I'm in Michigan and I can get this rearend to one of the border crossings if it helps the buyer to pick it up there.
Price is $1,850 USD
Please email me at Halletts1@chartermi.net