the differance between the super stock and super mod Was the super stock single ignition, triple roller drive chain steal cleated track with mild steal bird cage. the super mod had Dual ignition with 4 sparkplugs, single silent drive chain, Titanium cleated track and chrome molly bird cage. The super stock hood was yellow with black, the super mod was yellow with pin stripes! Our 1978 440 Skidoo Super mod Sn was 3563 01017Each 78 sno pro had a different model number based on cc's (250, 440, 440). The difference between the SS and Super Mod as far as model numbers was that they shared the same model number, but the super mod had a 01 extension, example using the 3653 from above the super mods vin would start 365301xxx. The super mods also had a different color hood as far as I know, orange/yellow vs black/yellow, also had lighter hoods. My 78 was a 340 SS.
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