Rear End Swap, which ones work?

[espacef1fan]

You can swap just about any factory 4-link GM rear in (A-Body, B-Body), even a 9" or 8.8", but there are some geometry issues with the 8.8"... aftermarket companies make bolt-in 9" rears.

Are the geometry issues just in the upper control arms?

 

[chevyman454]

the only difference in the older Abody "70-72 monte cutlassetc is about 2 1/2 inches wider and for the ppl that want BIG tires its a good way to get some really needed clearance ^^

its what i did just got to make sure you put new bushings in too it makes it even better (still gotta do that 🙁 )
also want some extra lift in the back? use the 70-72 montes cutlass etc rear springs

 

[Doober]

You can swap just about any factory 4-link GM rear in (A-Body, B-Body), even a 9" or 8.8", but there are some geometry issues with the 8.8"... aftermarket companies make bolt-in 9" rears.

Are the geometry issues just in the upper control arms?

For the 8.8" I believe there is something about geometry issues, they typically use spherical ends to take care of this, I think the main thing with 8.8 is where it puts the instant center (quite a bit of math/measuring, I haven't really looked into it yet).
http://www.theturboforums.com/smf/index ... c=104354.0

 

[stss95]

2.14 rearend? that thing must be a real slug, i thought my 2.56s were bad.

 

[Doober]

I have 2.29s and mine is no slug 😉