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ss3011 · 12-14-2013, 09:52 PM

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 .

12-14-2013, 09:52 PM	#25
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: GM Stocker rear end 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 .