which rear to use for autox?

I am currently building a road/autocross car out of my 71 duster and I have several rear axle choices. I was wondering which rear end would do well in my application due to the hard cornering and such. I have at my disposal a stack of 8.75s a ford 9" and a ford 8.8. The 8.8 worrys me a little being a C clip type, and i have heard that the green brgs in the 8.75s dont like alot of hard cornering and i would assume the 9" would be very simmalar to the 8.75. but im looking for your oppionion on this thanks