Odd option on LS6 Chevelle

[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.