After making the "Powerful Diesel for Wentward!" mod,
I tried to import an Automation-made engine into the Wentward
and it worked. So I made this beasty 8.9L V8
with 464 hp @ 2400 rpm
and 1378 NM of torque @ 2400 rpm.
(You won't be able to see it's model on the bus,
I didn't know how to do that yet.)