So far I've had decent service out of my Maxxforce 13 engine but I'm concerned about rebuilding it when the time comes. Being a compacted steel block instead of a cast iron block I'm not so sure I want to rebuild it. I don't much care for DPF engines either. So my question is, has anyone had any luck swapping out engines. I now Internationals were available with the Maxxforce 15 (Caterpillar block), Maxxforce 13 (MAN engine) and a Cummins engine. What will I be facing if I decide down the road I want to swap this engine with say... a 2003 ISX engine rebuilt. Don't tell me legal issues because I don't care about those. I'm more interested in the nuts and bolts part. Thanks in advance for any help....