75 Nova Rear end value?

just like the title says>>any guesses? used of course out of a donor car, i've got one ive had layin around...not sure of gears...out of a 4 door so doubt it's posi or above a ...3.23 ...prolly 2.73...but won't it interchange with 68-74 nova's...and camaro/firebirds 67-69?

I paid $100. for my rear axle. it came out of a 73, came with multi leaf springs and it was an 8.5 10 bolt you need to I.D. it..... is it a 8.2 or 8.5 ten bolt?

it's an 8.5...they didn't put the 8.2 in nova's after 71, and they used the 8.5 until 75