Copo Automatics

[Jim Mattison]

Guys, hopefully I can put the issue of smog vs. no smog (including Canadian cars)to rest!

The validation and emission certification on the COPO 427 Camaros and Chevelles, both the aluminum and iron blocks were "grandfathered" in off the Corvette. The Corvette engines had smog pumps (both automatic and 4-spd), therefore so did the COPO cars (including the Canadian vehicles).

Jim Mattison

[olredalert]

Thanks Jim,

------That probably puts that question to rest on COPOs,but how about these lower horsepower big-block cars?Do you have the bottom line on them as well?Inquiring minds want to know!........Bill S

[sYc]

Jim; Thanks, this has been debated numerous times on this site, glad to get a definite answer. Makes sense since they are the same.

Now, to another question. The COPO cars (427) came with a 396/375 HP emission sticker. Why was this? It had been runored that they were "snuck" through, to save the hassle of going through the whole certification thing for just a small number of engines/cars. But, since the engines were the same, and were grandfathered in, why not have a 427/425 sticker?

And, by the way, hope the search for the Chevy records is going well. We all are anxiuosly waiting. [img]/ubbthreads/images/graemlins/biggthumpup.gif[/img]

[Jim Mattison]

The 427 Camaros and Chevelles, from a scheduling (and internal paperwork) standpoint started out as L78 cars. The parts and pieces to build these cars as 427's was a lengthy process of adds and deducts to the L78 option.

I can only guess that the emission label was accidentally overlooked.

Jim Mattison

[sYc]

Jim; Thanks, makes sense. Another myth put to rest.