For whatever reasons the Non Copo 3:55/4:10 and other factory and dealer supplied axles were included in this Copo 9511 discussion at the beginning and I've been trying to nicely bump it into the true 4:56/4:88 only facts all along..
So yes please let's separate the two subjects!.
Here's a link below to a new Copo 9511 thread and more specifically to <span style="text-decoration: underline">1969</span> when Copo 9511 included factory installed 4:56 & 4:88 only ratios..
1969 Copo 9511 A/F/X Body cars also 'Vettes were built and although largely unrecognized are true performance option '69 Copo cars to look for...especially the built but not found yet real '69 Copo Novas!.
https://www.yenko.net/ubbthreads/ubbt...575#Post457575
[img]<<GRAEMLIN_URL>>/beers.gif[/img]
~ Pete