bombardier never made a sled with the 454 in it for '83.
'82 was the last year for the 454 motor in the 9500 blizzard which was a twin piped sled. i don't think the 9500 blizzard pipes and canister will fit in a s chassis properly without some butchering.
get yourself a 583 to put in your sled, it will be much more easy to do.
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