One can purchase Cummins crate engines for swaps. They have an dedicated side business just for supplying these engines.
Ok, everyone talks about engines and what is tough and what is rugged. I'll tell you from deep underground hardrock mining experiance the old Deutz air cooled diesels are about as tough as it gets. They used them for decades in the mining industry and for powering tractors and ag equipment in Europe. They are super tough and operate in temps that would melt down and cook my Cummins. Go to youtube and check out some of the Deutz engine swaps from Latin America.
