Years ago when I had a 1962 Chevy II, I asked GM Nordiska AB here in Sweden if I was allowed to put a V8 in it and run it on the street. Their reply was that a 360 hp 327 cui engine was the biggest they would allow in a 62-64 Chevy II,with certain modifications made.
I later used that document to register a 1964 2dr sedan with a tunnelrammed 302.