[Paul Merolla]

Originally Posted by ss3011

What's the point of wanting to run a 9" rearend ? Strength ? A typical 12 bolt is lighter, and has better efficiency. Why would you want to use a slower rearend ?

Drag Pac, Cobra Jet, and COPO are all inclusion cars (paragraph 3, section 10A), which are not "factory-production assembled, showroom available, and in the hands of the general public" (paragraph 2). That is why the 9" is not considered an OEM rearend for a Chrysler or GM, and therefore not a legal replacement .

Finally, some logic enters the discussion...thank you.