I can't believe I've overlooked this thread! I always thought this would be a great engine swap. I would have liked to have done it on my '04 D2 when the liners slipped, but couldn't find anyone that could correctly integrate all the electronics. I would have thought the gas mileage would be higher though. My 3/4 ton work van has a 4.3 and consistently gets 15-16 mpg loaded on the highway.