Here's a shot of a 67 Impala 283. A Grande Parisienne will be pretty much identical, except of course for the Chevrolet script on the valve covers and the black oil fill tube. The Canadian tube will be engine colour and the breather will lack a top decal. Ignore the master and booster.
Here is a 67 327/275 Grande below. The 283 Grande has the smaller breather seen above. Canadian cars had a body colour firewall through 68.
Rad spacer was the same size for all non air SB's. Boosters could be black or plated.
I have quite a few Cp engine shots on my Flickr page.
