Odd option on LS6 Chevelle

[COPO_Anders]

Keith, my Impala had the F40 option. But George Z. said it should have been built with a 10-bolt.

[vintagez]

COPO Anders, I do not think I ever said whether your car came with a 10 or 12 bolt rear end as my documentation does not show that, you must look in the parts book and use the axle ID to see what is correct. Regarding the GV or GY not really defending myself, just curious what was written, whether it was by me or someone else. Lots of documentation floating around that has been done by other people in the 'old days' and if I made a mistake would like to catch it. I am always willing to re-check what I have done as in life I have learned I am not perfect, but do my best.

[COPO_Anders]

First of all I want to apologize for highjacking the thread. I didn´t mean to do that.

George, when I asked you about the 12-bolt rearend on the car you told me to read through the material you had sent me. After doing so I was convinced that it should have been built with a 10-bolt, just like you said. I therefore thought that the 12-bolt was put under the car at the factory by mistake.
But when Keith wrote: "There seems to be some evidence that any car ordered with the F40 option also got the 12 bolt. True??" I started to think that it maybe wasn´t by mistake.

So did F40 cars get 12-bolt rearends ?

Kurt, it has a powerglide as you can see in the document.