This is what it says when I look up AM54757 on Deere's part search:
Requested product is obsolete.
Requested part is not marketed in the ordering country

Im thinking it was a part number only marketed and available in Canada.

You gotta work for dealer to get that.

I looked the serial number up on Deere's dealer web site and it says it was settled for on Nov 11 1980, sold to PUR FM FAC USED X and its had all it PIP's done. Warranty was voided. Sounds like a test sled to me.

I am quite sure "mother deere" doesnt care about people restoring sleds, reproducing JD snowmobile parts or stickers. They stopped caring about sleds in 84. As long as your not using there logo or labeling parts as "Genuine John Deere Parts" they are not gonna care.

Yup I'll be there. Hope to find some good deals and maybe sell my 83 Liquifire.

I got a 78 340 I'll sell.

Wheres the auction at? Do you want a '78 340 or a 440?