http://www.camaros.org/askcrg-archives.shtml
The answer given in question 11 implies that there is no such thing. I myself have a 67 RS/SS built in Nov 66 and I discovered that it had small journals when I was doing the rebuild on it 20 years ago when I ordered the larger journal bearings and they did not fit properly. My car is all numbers matching(Vin-Eng-Trans-Rear Axle), I have full documentation of the car including the POP.
Has this issue been revisited as I really don't find much on the internet on it and the general consensus seems to be that all 350 are large journal.
Thanks