They won't build it. This has all been discussed before and it's only rumors.Cummins makes a V8 but its a twin turbo, 985 cubic inch, puttin out around 800 hp. That would be a great truck engine. Cummins Diesel Nissan Titan - Likely to be the first 1/2 ton diesel to make it into the market. Project scheduled to be completed by 2014. The Cummins powered Nissan Titan appears to be a sure thing. The 2.8L 4 cylinder Cummins, despite the displacement handicap, appears to be a performer. We just can't help but wonder why in the world Cummins would team up with Nissan. Read it "Likely"