How big is my rear end???

bnickel said:

if the car came with anything smaller than a 390 it will have an 8" rear.

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dennis112 said:

Almost correct. The K code (289 Hipo) engine should also have a 9" rear.

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D.Hearne said:

At this late date, after 40 years have gone by, his rear could be anything. So I'll add this: if you can remove the two bottom centersection nuts (holding the "chunk" in the front of the rearend) with a socket and ratchet, it's an 8", if you have to do this with an end wrench only, it's a 9". If the rear has a cover on the back, ain't no tellin what it is.

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