REAR SWAP

[CM360]

I'm familiar with the F body--66/67 B body 8 3/4 swap. Anything exist for the '81 Cordoba? Thanks

 

[M_Body_Coupe]

Same thing applies...the F/M/J-body measurements are the same.

 

[AMC Diplomat]

Might be a different driveshaft length for a J body vs the F and M

 

[M_Body_Coupe]

Might be a different driveshaft length for a J body vs the F and M

I thought you'd never ask!!! (LOL)

1980 and 1981 Parts Books scans attached

EDIT
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What an absolutely atrocious/abysmal rendering of the uploaded images you guys...yikes...I can't read any of it...PoS forum functionality, seriously...in today's age there is literally ZERO reason to downscale images!!!

 

[SRTMirada]

Actually, the axle width changed from 58.5" to 59.5" in 1980. This makes the 1968-70 b-body axle a better fit in J-bodies.

 

[CM360]

If that's the case, then 71-74 at 57 7/8 or 70-74 C body SW at 59 5/8.

 

[Mikes5thAve]

That looks like different measurement locations. M body is in the 54-55 range which makes it a match for early B body. Later B body and C body is too wide.

 

[CM360]

WE are talking about "J" body. Just used the F/M body as a reference.

 

[MyPly76]

Yeah the 68-70 B body 8 3/4 should work fine in your '81 Cordoba, just might need to mess with the driveshaft length a bit.