Copo 9561 - what does it mean? This was the dealer order number for a factory cast-iron 427 engine from the seldom used Central Office Production Order System. After all, Chevrolet was not in the business for the sole purpose of installing 400+ cid engines into the light weight Camaros. The real nuts and bolts of the COPO cars was the cast iron 427/425 engine. The COPO would start out as a basic SS 396 Camaro. By adding and deleting the following components, you can see how the COPO was built.
L78 396/375 hp engine
Engine emblem on air cleaner
SS hood with louvers
Open element air cleaner
SS 396 front coil springs
SS 396 rear leaf springs
Standard 12-bold rear axle
Standard SS 396 radiator
Standard positraction lube
SS rear panel emblem
SS front fender emblems
SS grill emblem
black rear panel between tail lights
L72 427/425 hp engine
427/425 decal *
complete ZL2 cowl induction hood system
cowl induction L78 air cleaner
HD F62 front springs
HD G32 five-leaf springs
4.10 service package 12 bolt
HD "curved neck" radiator**
Service package Lube
base Camaro bow-tie rear emblems****
base Camaro bow-tie grill emblem***
body color rear panel
* while the COPO called for the balance of the decals to be that of the L&* engine, most cars did have these decals installed.
** not all COPO's had the curved-neck radiator
*** when ordering with RS option, car received RS grill emblem but base Camaro fender emblems.
In 1967 and 1968, the 427 engines were installed by different Chevrolet dealers such as Fred Gibb, Yenko, Nickey and others.
source: The 1969 Camaro Reference Book
by John Hooper
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