1978 Ski-Doo Shop Manual, Page 107Get this manual
SECTION 04 SUB-SECTION 02 (ENGINES)
LIST OF ENGINE SECTIONS
247 248-294 305-343-402
Elan et Spirit 250 Elan Deluxe (248), Citation 300(294) Olympique 300T(305), Olympique and Nuvik 340(343), Everest 340(343), Futura 400(402) RV and Sonic 340 T'NT 340 FIA Blizzard 6500 Plus Everest and Futura 440, T'NT 440 FC Everest and Futura 444 LC and Elite 450 LC Alpine 640ER