The G84 refers to non standard gear ratios and was used for multiple gear options 4.10 through 4.88. If I remember right I took the info directly off of the copies of GMs official sales records I have from 1969 which covers all options and models and the COPO 9511 was part of the description next to that RPO which does seem a bit odd to me as well. I will try dig them out and see if there is anything else that may be of help to the topic in particular for Novas and double check for anything else. Will take a few days though.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mockingbird812</div><div class="ubbcode-body">This was from Wilma's link:
<span style="font-style: italic"><span style="font-weight: bold">G80 1969 Camaro Positraction rear axle, when ordered without RPO Z28 or SS 396. $56.90 48,755
G80 1969 Camaro Positraction rear axle. $42.15 48,755
G84 1969 Camaro 4.10:1 Rear gear ratio. $2.15 8,018
G84 1969 Camaro COPO 9511 4.56:1 Rear gear ratio. $42.15 N/A
G84 1969 Camaro COPO 9511 4.88:1 Rear gear ratio. $42.15 N/A</span></span>
Last column above is for total ordered. Each of the "COPO" item above is linked to an RPO of G84....I'm confused [img]<<GRAEMLIN_URL>>/hmmm.gif[/img] ! </div></div>