Hey Cadete, try the following and see if it helps
www.autoshop-online.com/auto101/engtext.html
Sorry, I don't know how to make it an active link thing. Also, couldn't find anything illustrated.
As to a 'differential autobloquant,' this must refer to the differential in the rear end (between the rear wheels) that allows them to operate at different speeds when rounding a corner.
Small block/big block has only ever been used in reference to American engines, and I belive dividing line is about 400 cubic inches and higher for a 'big block,' but Tim Northcut and Noise Boy are better sources then me on that.