That's interesting Don and expensive. Note he says it fits 55, 65, 75 and M2 1928
Nice try but first 3 are 6 cyl and 4th is 4 cyl Here's part of aftermarket which says differently. 6 cyl has its own body and parts as does 4 cyl. Case of buyer beware perhaps.
Part number W5K400 might be a clue it fits a W5A 4 cyl or a fluke in number.
Where Are You From? Ottawa Ontario Canada
Do You own a car built by Durant? 1932 614 sedan made by Dominion Motors