90halfton
I'm Awesome
4bt was by far the most logical of the ideas you've had. Mileage and reliability will far exceed that of the 6.5. May be a bit more invasive though. Any diesel you'll also need a new form of brake booster, and motor mounts, and stall, and unknown number of electronic alterations, possibly radiator. Crate motor starts to sound really easy, hard to argue with the logic of a diesel engine though.