1. Downloaded the Steam Workshop Version
2. Went to the workshop directory and copied all files to a temp directory
3. Created a ZIP/SCS archive of the files
4. Activated that archive in-game
5. Took my W900 and went to a garage
6. Found your Detroit engines correctly in the garage engine menu and choose one
I just will do another trial and alternatively will download the truckymods.io version. Perhaps, something's weird with the archive I created out of the Steam Workshop version - although this procedure did work flawless with other mods in the past.
Reason I did so with the Steam WS version before was that I generally planned to perhaps add some more truck mods, and I did not want to get them overwritten with future updates from Steam WS side.
But perhaps - if the truckymods.io version now works -, I'll simply abandon the Workshop one.
I'll keep you updated. Thanks for your help and your question above which made me reflect what might have gone wrong.
EDIT:
Okay, I just notice, when comparing the two archives - mine from Steam WS and yours from truckmods.io -, that mine might be compressed too much - although I thought ATS/ETS2 meanwhile support "normal" compression. Yours from truckymods.io apparently is only "saved" into the archive.
... okay... might be the culprit...
EDIT 2:
@SlavJerry
It was really my fault, probably when packing / because of "normal" compressing the workshop archive => the truckymods.io works fine and sounds absolutely GREAT!
So, sorry for the false alarm
