a friend of mine has a 3.08 rear end from a 70 z28 and i was wondering if it will fit in my car. I heard i rear with a 3.08 carrier to fit 3.73 gears.

are the rear ends the same size?

 

nope

 

that was simple enough, but just out of curiousity and the quest for futher knowledge is the 70 rear-end wider or shorter?

 

this rear end will fit under your car you will cut and reweld mounting pearches from your original rear and purchase a brace that mounts to the housing just like the 12bolt conversion,i have one in my 83z,has been stout enough with my old big block z runnin 10.60s w/1.48 60' times, 11 yrs,now its in a small block z i am sure my 350 will NEVER see the power of the ratt!!!!!!!!i can e-mail you the pics of the bracket,very basic...the 8.2 and 8.5 look similar but i would use the 8.5 from 74-81f-body......

 

can someone give me the measurement from backing plate to backing plate on my car so i can send her the measurement and then see what she has to say? id go out and measure but theres about 3-4 inches of snow on the ground

 

3.08 uses a different carrier than the 3.73s (2 series vs 3 series).

Is the rear a 12-bolt or a 10-bolt?

 

dont know

its a 3.08 rear from a 70 z/28 i belive its original but not positive

my rear is a 2.73

....know the bp-bp width on my car?

 

Count up the bolts that hold the cover on the back of the rear.

Not 100% sure of the width. Look around on the net. I'm sure you'll find it.

 

That applies to 7.5" diffs.

On 8.5" diffs, the 2.73 and higher gears use a 3 series carrier. 2.56 and lower is a 2 series. I don't know if the 8.2" that would be in a 70 Camaro follows that case break.


A 10 bolt is a 10 bolt because of ring gear to carrier bolts. Not cover bolts.

 

original 70 z28 would have a 12 bolt posi. width shouldn't be a problem, everything else would be. it's like night and day differances. thirdgen f body rear end width is 56" i think

 

Do you have any idea what a 70Z 12 bolt rear end is worth these days? Only year for the big diff in the second gen camaros. Worth a fortune. Don't cut it up.

 

Good thing you can put leaf perches on a 68-72 A/G-body 12 bolt and put it in an F since they're the same width.

 

$650-$900 depending on who buys it. You may see them go for more than that on eBay, but those are crackhead prices. Half of those sales don't even end up going through once people find out how expensive it is to ship a rear.

 

An original '70 Z/28 rear won't have 3.08 gears unless they were installed later. On the Z/28, you could only get either 3.73 gears or 4.11 gears.

Some other '70 Camaro model could have the 3.08, but not a Z/28.