I found a local guy parting out a 79 z28 and it has 3.73 and posi not sure if its a 10 bolt 9 bolt or what gonna call tommorow
but will it bolt right up in my car or would i have to rework some things
and what do you think it would be worth:lala:

 

It won't fit, there is no provision for the tq arm or anything. 2nd gens are leaf spring rear suspensions.

 

wow the older oens are leaf arent they ?! yeah, we got coils, yay i didnt even realize that ! event he novas were leaf, everything cept the chevelles, hmmm... interesting... so how in the fudge can we get an 8.5" axle under our third gen ?

 

Two words: fabricate :sillylol:

 

well thats crappy.. has anyone done this ?! what is the width of our 82-up 7.5" axles from plate to plate ?? wonder how much different mounting of a G body 3.42 axle is from ours ? hmm..

 

G-body rears are shorter than 3 gen rears, not to mention a 8.5 GN/442 rear runs +$600 bucks minimum...and if your going to the hassle to fabricate a rear end to fit..go with a 9 inch..better rear than a 8.5 and a better selection of vehicles and ratios to scrounge from...btw using a 78 Lincoln Versailes housing with 86 SVO discs brakes (around $500 bucks in parts) on my Malibu but I made the brackets and mounts. cheers, Bob

 

yeah some of the 76-79 caddies have rear discs too- truck(always been a truck guy til i got this maro, now im kinda into these now) guys use these two rear axles too, also can convert to rear discs by using dana44 calipers- i have a pair laying aorund right now and brackets too- and brackets or make own brackets,

thanks

 

Finding a diff that fits isn't hard. The hard part is deciding how to use the suspension. The spring and shock mounts can be easily swapped over to the new diff however there's no way to mount the torque arm. On a 9" diff you can buy the torque arm mount from Currie and weld it on but all the GM diffs are cast iron making welding on mounts almost impossible.