I found this at the Jensales website that sells gaskets for tractors.
They have a reproduction engine manual in either printed or PDF download verson. Link is below.


Durant C, CC, F, M, M-2, M-4 Automobile Service Manual

Brand Category: Durant
Product Code: DUR-S-C CC F+

$28.05

Enhanced Reproduction (Written by Manufacturer) - Printed Copy and/or PDF Digital Download


https://www.jensales.com/products/Durant-Tractor-Service-Manual-DUR-S-C-CC-F_p_70881

Where Are You From? Fremont, CA

Do You own a car built by Durant? 1929 modeel 60 and 1931 model 619