My 1940 UMS book shows under Oldsmobile: 32-34 6 & 8 cyl. # 1853907; 35-36 all, 538-z, and heavy duty # 115140; 37-38 all, 1115126, heavy duty # 545-B and 39-42 all # 1115126 and heavy duty @ 1115140. Neither the specific car or the general listing have either of your numbers. Sorry, that is the best I can offer