1972 Ski-Doo Shop Manual, Page 153Get this manual
TWO CYLINDER 26Install the exhaust socket flanges to the cylinders using new exhaust gaskets and four (4) nuts and washersNOTE: On 340, 399 and 440 engines (with the incorporated socketflange), firmly screw sockets into the cylindersCAUTION: Ensure the shorter socket is posi tioned on the P.T.Oside of engine27Temporarily affix armature plate to crank case using the appropriate screws (fig2-3-34)