Steve NW WI
Unwanted Riff Raff.
Definitely a IH motor, here in the States it could have been 304, 345, or most common 392 CI in the Loadstars. Most of the 304 and 345 motors were in buses and light duty trucks here. There was also a 549CI motor, but that's a fairly rare motor, and a different block than the other 3.